中国水稻科学 ›› 2017, Vol. 31 ›› Issue (5): 500-512.DOI: 10.16819/j.1001-7216.2017.6145
李娜, 杨志远, 代邹, 孙永健, 徐徽, 何艳, 蒋明金, 严田蓉, 郭长春, 马均*()
收稿日期:
2016-11-01
修回日期:
2016-12-28
出版日期:
2017-10-10
发布日期:
2017-09-10
通讯作者:
马均
基金资助:
Na LI, Zhiyuan YANG, Zou DAI, Yongjian SUN, Hui XU, Yan HE, Mingjin JIANG, Tianrong YAN, Changchun GUO, Jun MA*()
Received:
2016-11-01
Revised:
2016-12-28
Online:
2017-10-10
Published:
2017-09-10
Contact:
Jun MA
摘要:
目的 探究水氮管理措施对不同氮效率水稻根系构型、氮素吸收利用和产量形成的影响,以及根系性状特征与氮素吸收利用和产量关系。方法 试验采用三因素裂裂区设计,主区为2个不同氮效率水稻品种德香4103(氮高效型)和宜香3724(氮低效型),裂区设置“常规灌溉”和“控制性交替灌溉”2种水分管理方式,裂裂区为SPAD指导施肥、优化施肥以及农民习惯施肥3种施氮模式,运用岭回归分析方法探究根系构型与氮素吸收利用和产量的关系。结果 水稻抽穗期根系性状、产量、每穗粒数、千粒重及总颖花量均存在显著的基因型差异。氮高效品种德香4103每穗粒数多,群体库容量大,产量较氮低效品种宜香3724高0.24%~11.31%;控制性交替灌溉有利于水稻千粒重的增长,常规灌溉则对水稻有效穗数、每穗粒数及群体颖花量提高更为有利;SPAD指导施肥和优化施肥处理能够提高水稻有效穗数和每穗粒数,扩大群体颖花量以保证其对农民习惯施肥的产量优势;由于水氮互作效应的存在,控制性交替灌溉下施氮处理与空白处理水稻千粒重的差距比常规灌溉的大幅降低,使得控制性交替灌溉下施用氮肥的增产效果更佳。德香4103的氮肥生理利用率较宜香3724平均高8.69%,常规灌溉下水稻氮积累量较高,控制性交替灌溉下氮肥回收率、农学利用率、生理利用率均较优;与农民习惯施肥处理相比,SPAD指导施肥与优化施肥模式更有利于水稻氮素吸收利用效率的提高。拔节期、抽穗期和成熟期水稻根系构型与产量岭回归方程的决定系数范围为0.4198~0.9028,其中,抽穗期根系性状与产量关系最为密切,氮高效和氮低效品种的决定系数均超过0.9。在拔节期,水稻细分枝根长对产量影响最大;在抽穗期,氮高效和氮低效品种存在差异,前者是粗分枝根长,后者是细分枝根表面积对产量影响最大;在成熟期,不定根长与产量关系最为密切。水稻抽穗期根系构型对氮积累量变化的解释程度较高,岭回归方程决定系数均接近0.7。就水氮管理措施而言,氮高效和氮低效水稻均应采用常规灌溉配套SPAD指导施肥或控制性交替灌溉结合优化施肥来实现产量的提高。结论 水稻抽穗期根系构型与产量、氮积累量关系密切,采用合理的水氮管理措施能够实现水稻产量和氮素吸收利用效率的同步提高。
中图分类号:
李娜, 杨志远, 代邹, 孙永健, 徐徽, 何艳, 蒋明金, 严田蓉, 郭长春, 马均. 水氮管理对不同氮效率水稻根系性状、氮素吸收利用及产量的影响[J]. 中国水稻科学, 2017, 31(5): 500-512.
Na LI, Zhiyuan YANG, Zou DAI, Yongjian SUN, Hui XU, Yan HE, Mingjin JIANG, Tianrong YAN, Changchun GUO, Jun MA. Effects of Water-Nitrogen Management on Root Traits, Nitrogen Accumulation and Utilization and Grain Yield in Rice with Different Nitrogen Use Efficiency[J]. Chinese Journal OF Rice Science, 2017, 31(5): 500-512.
施氮模式 N management mode | 施氮量及施氮时期 N application rate and stages | 总施氮量 Total N rate/(kg·hm-2) | |||
---|---|---|---|---|---|
基肥 Basal N/(kg·hm-2) | 蘖肥 N application for tillering /(kg·hm-2) | 促花肥 N application for spikelet boosting/(kg·hm-2) | 保花肥 N application for spikelet preserving/(kg·hm-2) | ||
SPAD指导施肥 SPAD-diagnosis N management | 0 | 自移栽后7 d至齐穗期,若叶绿素仪读数SPAD < 37.5,施氮15 kg/hm2,SPAD > 37.5,不施氮。其中,拔节期(倒4叶龄期),若SPAD < 37.5,施氮30 kg/hm2。每周测1 次。 | 120 | ||
优化施肥模式 Optimal N management | 45(30%) | 45(30%) | 30 (20%) | 30 (20%) | 150 |
农民习惯施肥 Farmer’s usual N management | 105(70%) | 45(30%) | 0 | 0 | 150 |
表1 氮肥施用量及施肥时期
Table 1 N application rate and fertilization stage.
施氮模式 N management mode | 施氮量及施氮时期 N application rate and stages | 总施氮量 Total N rate/(kg·hm-2) | |||
---|---|---|---|---|---|
基肥 Basal N/(kg·hm-2) | 蘖肥 N application for tillering /(kg·hm-2) | 促花肥 N application for spikelet boosting/(kg·hm-2) | 保花肥 N application for spikelet preserving/(kg·hm-2) | ||
SPAD指导施肥 SPAD-diagnosis N management | 0 | 自移栽后7 d至齐穗期,若叶绿素仪读数SPAD < 37.5,施氮15 kg/hm2,SPAD > 37.5,不施氮。其中,拔节期(倒4叶龄期),若SPAD < 37.5,施氮30 kg/hm2。每周测1 次。 | 120 | ||
优化施肥模式 Optimal N management | 45(30%) | 45(30%) | 30 (20%) | 30 (20%) | 150 |
农民习惯施肥 Farmer’s usual N management | 105(70%) | 45(30%) | 0 | 0 | 150 |
品种 Cultivar | 灌溉方式Irrigation pattern | 施氮模式 N management mode | 有效穗数 Productive panicle number/(×104 hm-2) | 每穗粒数 Spikelet number per panicle | 结实率 Seed-setting rate /% | 千粒重 1000-grain weight /g | 总颖花量 Total spikelet Number/(×106 hm-2) | 产量 Grain yield /(kg·hm-2) |
---|---|---|---|---|---|---|---|---|
德香4103 Dexiang 4103(C1) | W1 | CK | 212.52±1.47 c | 142.58±2.31 c | 90.83±2.01 a | 33.43±0.60 a | 303.01±5.86 c | 9 135±334.75 c |
N1 | 235.10±10.11 b | 211.16±16.46 a | 83.92±0.68 b | 30.56±0.47 c | 496.21±40.90 a | 12 311±266.06 a | ||
N2 | 246.63±7.95 ab | 205.39±4.11 a | 80.74±2.67 b | 30.90±0.55 bc | 506.54±19.50 a | 12 077±114.48 a | ||
N3 | 252.20±4.93 a | 162.49±5.79 b | 90.72±2.80 a | 32.30±0.17 ab | 409.94±20.60 b | 11 500±401.06 b | ||
平均 Average | 236.61 | 180.41 | 86.55 | 31.80 | 428.92 | 11 256 | ||
W2 | CK | 193.72±3.70 c | 138.68±3.16 c | 91.24±2.40 a | 33.63±1.03 a | 268.66±11.11 c | 8 120±365.81 c | |
N1 | 234.15±4.52 b | 190.35±6.44 a | 84.61±2.51 c | 32.78±1.06 a | 445.57±10.86 a | 11 961±283.28 a | ||
N2 | 241.84±10.63 ab | 185.38±13.41 a | 85.76±0.74 bc | 32.82±0.16 a | 447.65±23.56 a | 12 239±341.80 a | ||
N3 | 249.09±8.14 a | 155.33±6.66 b | 88.06±1.40 ab | 34.43±1.53 a | 387.21±27.97 b | 11 351±134.61 b | ||
平均 Average | 229.70 | 167.44 | 87.42 | 33.41 | 387.27 | 10 918 | ||
宜香3724 Yixiang 3724(C2) | W1 | CK | 198.03±2.58 b | 131.20±3.42 b | 88.85±1.58 a | 36.34±1.01 a | 259.80±5.30 c | 8 373±147.22 c |
N1 | 235.18±10.44 a | 183.20±14.44 a | 84.48±2.22 b | 33.58±0.02 b | 430.48±32.50 a | 11 977±418.03 a | ||
N2 | 241.37±6.10 a | 178.67±6.04 a | 84.77±2.67 b | 34.42±0.19 b | 431.47±24.29 a | 12 048±200.90 a | ||
N3 | 246.25±10.00 a | 143.43±5.56 b | 89.16±0.61 a | 36.36±0.69 a | 352.91±8.82 b | 11 132±227.75 b | ||
平均 Average | 230.21 | 159.13 | 86.81 | 35.17 | 368.67 | 10 882 | ||
W2 | CK | 190.95±3.65 c | 117.47±2.01 c | 89.62±0.37 a | 36.76±0.53 ab | 224.31±6.59 c | 7 295±124.53 c | |
N1 | 229.79±4.93 b | 179.56±7.94 a | 81.11±1.21 b | 36.66±1.23 ab | 412.36±10.38 a | 11 887±305.06 a | ||
N2 | 238.10±11.19 ab | 175.79±3.66 a | 80.72±3.66 b | 35.33±0.85 b | 418.28±11.19 a | 11 621±233.07 a | ||
N3 | 243.05±11.10 a | 144.32±4.26 b | 88.05±1.68 a | 37.37±2.33 a | 350.94±23.67 b | 11 097±199.41 b | ||
平均 Average | 225.47 | 154.29 | 84.88 | 36.53 | 351.47 | 10 475 | ||
C1平均Average | 233.16 | 173.92 | 86.99 | 32.61 | 408.10 | 11 086.88 | ||
C2 平均Average | 227.84 | 156.71 | 85.84 | 35.85 | 360.07 | 10 678.71 | ||
F值F-value | 品种C | 3.83 ns | 35.53* | 5.66 ns | 3399.64** | 29.55* | 19.65* | |
灌溉方式W | 16.63* | 10.38* | 0.55 ns | 22.24** | 52.69** | 183.26** | ||
施氮模式N | 100.47** | 169.12** | 44.51** | 12.67** | 207.92** | 826.41** | ||
C×W | 0.58 ns | 2.16 ns | 3.71 ns | 0.17 ns | 9.10* | 1.59 ns | ||
C×N | 0.39 ns | 0.20 ns | 0.30 ns | 0.23 ns | 0.09 ns | 4.38* | ||
W×N | 1.19 ns | 0.90 ns | 1.31 ns | 3.02* | 0.89 ns | 13.01** | ||
C×W×N | 0.61 ns | 2.16 ns | 4.79** | 0.77 ns | 0.67 ns | 2.19 ns |
表2 水氮管理对不同氮效率水稻产量及其构成因素的影响
Table 2 Effects of water-nitrogen management on grain yield and its components in rice with different N use efficiencies.
品种 Cultivar | 灌溉方式Irrigation pattern | 施氮模式 N management mode | 有效穗数 Productive panicle number/(×104 hm-2) | 每穗粒数 Spikelet number per panicle | 结实率 Seed-setting rate /% | 千粒重 1000-grain weight /g | 总颖花量 Total spikelet Number/(×106 hm-2) | 产量 Grain yield /(kg·hm-2) |
---|---|---|---|---|---|---|---|---|
德香4103 Dexiang 4103(C1) | W1 | CK | 212.52±1.47 c | 142.58±2.31 c | 90.83±2.01 a | 33.43±0.60 a | 303.01±5.86 c | 9 135±334.75 c |
N1 | 235.10±10.11 b | 211.16±16.46 a | 83.92±0.68 b | 30.56±0.47 c | 496.21±40.90 a | 12 311±266.06 a | ||
N2 | 246.63±7.95 ab | 205.39±4.11 a | 80.74±2.67 b | 30.90±0.55 bc | 506.54±19.50 a | 12 077±114.48 a | ||
N3 | 252.20±4.93 a | 162.49±5.79 b | 90.72±2.80 a | 32.30±0.17 ab | 409.94±20.60 b | 11 500±401.06 b | ||
平均 Average | 236.61 | 180.41 | 86.55 | 31.80 | 428.92 | 11 256 | ||
W2 | CK | 193.72±3.70 c | 138.68±3.16 c | 91.24±2.40 a | 33.63±1.03 a | 268.66±11.11 c | 8 120±365.81 c | |
N1 | 234.15±4.52 b | 190.35±6.44 a | 84.61±2.51 c | 32.78±1.06 a | 445.57±10.86 a | 11 961±283.28 a | ||
N2 | 241.84±10.63 ab | 185.38±13.41 a | 85.76±0.74 bc | 32.82±0.16 a | 447.65±23.56 a | 12 239±341.80 a | ||
N3 | 249.09±8.14 a | 155.33±6.66 b | 88.06±1.40 ab | 34.43±1.53 a | 387.21±27.97 b | 11 351±134.61 b | ||
平均 Average | 229.70 | 167.44 | 87.42 | 33.41 | 387.27 | 10 918 | ||
宜香3724 Yixiang 3724(C2) | W1 | CK | 198.03±2.58 b | 131.20±3.42 b | 88.85±1.58 a | 36.34±1.01 a | 259.80±5.30 c | 8 373±147.22 c |
N1 | 235.18±10.44 a | 183.20±14.44 a | 84.48±2.22 b | 33.58±0.02 b | 430.48±32.50 a | 11 977±418.03 a | ||
N2 | 241.37±6.10 a | 178.67±6.04 a | 84.77±2.67 b | 34.42±0.19 b | 431.47±24.29 a | 12 048±200.90 a | ||
N3 | 246.25±10.00 a | 143.43±5.56 b | 89.16±0.61 a | 36.36±0.69 a | 352.91±8.82 b | 11 132±227.75 b | ||
平均 Average | 230.21 | 159.13 | 86.81 | 35.17 | 368.67 | 10 882 | ||
W2 | CK | 190.95±3.65 c | 117.47±2.01 c | 89.62±0.37 a | 36.76±0.53 ab | 224.31±6.59 c | 7 295±124.53 c | |
N1 | 229.79±4.93 b | 179.56±7.94 a | 81.11±1.21 b | 36.66±1.23 ab | 412.36±10.38 a | 11 887±305.06 a | ||
N2 | 238.10±11.19 ab | 175.79±3.66 a | 80.72±3.66 b | 35.33±0.85 b | 418.28±11.19 a | 11 621±233.07 a | ||
N3 | 243.05±11.10 a | 144.32±4.26 b | 88.05±1.68 a | 37.37±2.33 a | 350.94±23.67 b | 11 097±199.41 b | ||
平均 Average | 225.47 | 154.29 | 84.88 | 36.53 | 351.47 | 10 475 | ||
C1平均Average | 233.16 | 173.92 | 86.99 | 32.61 | 408.10 | 11 086.88 | ||
C2 平均Average | 227.84 | 156.71 | 85.84 | 35.85 | 360.07 | 10 678.71 | ||
F值F-value | 品种C | 3.83 ns | 35.53* | 5.66 ns | 3399.64** | 29.55* | 19.65* | |
灌溉方式W | 16.63* | 10.38* | 0.55 ns | 22.24** | 52.69** | 183.26** | ||
施氮模式N | 100.47** | 169.12** | 44.51** | 12.67** | 207.92** | 826.41** | ||
C×W | 0.58 ns | 2.16 ns | 3.71 ns | 0.17 ns | 9.10* | 1.59 ns | ||
C×N | 0.39 ns | 0.20 ns | 0.30 ns | 0.23 ns | 0.09 ns | 4.38* | ||
W×N | 1.19 ns | 0.90 ns | 1.31 ns | 3.02* | 0.89 ns | 13.01** | ||
C×W×N | 0.61 ns | 2.16 ns | 4.79** | 0.77 ns | 0.67 ns | 2.19 ns |
品种 Cultivar | 灌溉方式 Irrigation pattern | 施氮模式 N management mode | 氮积累量 N accumulation | 氮肥回收率 N recovery efficiency /% | 氮肥农学利用率 N agronomic efficiency /(kg·kg-1) | 氮肥生理利用率 N physiological efficiency /(kg·kg-1) |
---|---|---|---|---|---|---|
德香4103 Dexiang 4103(C1) | W1 | CK | 128.20±6.28 c | — | — | — |
N1 | 204.98±2.88 a | 63.98±4.04 a | 26.47±1.32 a | 41.41±1.95 a | ||
N2 | 205.41±2.56 a | 51.47±4.79 b | 19.61±1.98 b | 38.10±1.40 b | ||
N3 | 193.27±6.20 b | 43.38±5.11 c | 15.76±1.59 c | 36.40±1.21 b | ||
平均 Average | 182.97 | 52.95 | 20.61 | 38.64 | ||
W2 | CK | 112.16±7.42 c | — | — | — | |
N1 | 191.44±5.23 a | 66.07±5.57 a | 32.01±0.73 a | 48.65±3.65 a | ||
N2 | 198.88±4.84 a | 57.82±3.38 b | 27.46±2.31 b | 47.49±2.83 a | ||
N3 | 182.03±6.48 b | 46.58±2.55 c | 21.54±2.62 c | 46.12±3.17 a | ||
平均 Average | 171.13 | 56.82 | 27.00 | 47.42 | ||
宜香3724 Yixiang 3724(C2) | W1 | CK | 111.21±4.03 c | — | — | — |
N1 | 205.43±8.41 a | 78.52±9.97 a | 30.03±4.23 a | 38.21±1.03 a | ||
N2 | 207.89±2.54 a | 64.46±3.29 b | 24.5±2.30 b | 37.95±1.73 a | ||
N3 | 192.74±7.79 b | 54.35±6.04 c | 18.39±1.57 c | 33.92±1.60 b | ||
平均 Average | 179.32 | 65.78 | 24.31 | 36.69 | ||
W2 | CK | 96.44±2.89 c | — | — | — | |
N1 | 199.87±2.84 a | 86.19±4.1 a | 38.26±3.56 a | 44.34±2.17 a | ||
N2 | 192.88±0.84 ab | 64.29±1.82 b | 28.84±2.37 b | 44.81±2.58 a | ||
N3 | 187.39±6.43 b | 60.63±6.04 b | 25.35±2.04 c | 41.86±0.80 a | ||
平均 Average | 169.15 | 70.37 | 30.82 | 43.67 | ||
C1平均Average | 177.05 | 54.88 | 23.81 | 43.03 | ||
C2平均Average | 174.23 | 68.07 | 27.56 | 40.18 | ||
F值F-value | 品种C | 2.71 ns | 13.79 ns | 4.27 ns | 21.35* | |
灌溉方式W | 119.28** | 10.78* | 250.58** | 46.67** | ||
施氮模式N | 888.36** | 107.66** | 171.70** | 12.58** | ||
C×W | 0.69 ns | 0.08 ns | 0.02 ns | 0.61 ns | ||
C×N | 10.68** | 3.09 ns | 1.31 ns | 1.48 ns | ||
W×N | 1.17 ns | 0.21 ns | 0.21 ns | 1.12 ns | ||
C×W×N | 1.62 ns | 2.12 ns | 3.41 ns | 0.12 ns |
表3 水氮管理对不同氮效率水稻氮素吸收利用的影响
Table 3 Effects of water-nitrogen management on N accumulation and utilization in rice with different N use efficiencies.
品种 Cultivar | 灌溉方式 Irrigation pattern | 施氮模式 N management mode | 氮积累量 N accumulation | 氮肥回收率 N recovery efficiency /% | 氮肥农学利用率 N agronomic efficiency /(kg·kg-1) | 氮肥生理利用率 N physiological efficiency /(kg·kg-1) |
---|---|---|---|---|---|---|
德香4103 Dexiang 4103(C1) | W1 | CK | 128.20±6.28 c | — | — | — |
N1 | 204.98±2.88 a | 63.98±4.04 a | 26.47±1.32 a | 41.41±1.95 a | ||
N2 | 205.41±2.56 a | 51.47±4.79 b | 19.61±1.98 b | 38.10±1.40 b | ||
N3 | 193.27±6.20 b | 43.38±5.11 c | 15.76±1.59 c | 36.40±1.21 b | ||
平均 Average | 182.97 | 52.95 | 20.61 | 38.64 | ||
W2 | CK | 112.16±7.42 c | — | — | — | |
N1 | 191.44±5.23 a | 66.07±5.57 a | 32.01±0.73 a | 48.65±3.65 a | ||
N2 | 198.88±4.84 a | 57.82±3.38 b | 27.46±2.31 b | 47.49±2.83 a | ||
N3 | 182.03±6.48 b | 46.58±2.55 c | 21.54±2.62 c | 46.12±3.17 a | ||
平均 Average | 171.13 | 56.82 | 27.00 | 47.42 | ||
宜香3724 Yixiang 3724(C2) | W1 | CK | 111.21±4.03 c | — | — | — |
N1 | 205.43±8.41 a | 78.52±9.97 a | 30.03±4.23 a | 38.21±1.03 a | ||
N2 | 207.89±2.54 a | 64.46±3.29 b | 24.5±2.30 b | 37.95±1.73 a | ||
N3 | 192.74±7.79 b | 54.35±6.04 c | 18.39±1.57 c | 33.92±1.60 b | ||
平均 Average | 179.32 | 65.78 | 24.31 | 36.69 | ||
W2 | CK | 96.44±2.89 c | — | — | — | |
N1 | 199.87±2.84 a | 86.19±4.1 a | 38.26±3.56 a | 44.34±2.17 a | ||
N2 | 192.88±0.84 ab | 64.29±1.82 b | 28.84±2.37 b | 44.81±2.58 a | ||
N3 | 187.39±6.43 b | 60.63±6.04 b | 25.35±2.04 c | 41.86±0.80 a | ||
平均 Average | 169.15 | 70.37 | 30.82 | 43.67 | ||
C1平均Average | 177.05 | 54.88 | 23.81 | 43.03 | ||
C2平均Average | 174.23 | 68.07 | 27.56 | 40.18 | ||
F值F-value | 品种C | 2.71 ns | 13.79 ns | 4.27 ns | 21.35* | |
灌溉方式W | 119.28** | 10.78* | 250.58** | 46.67** | ||
施氮模式N | 888.36** | 107.66** | 171.70** | 12.58** | ||
C×W | 0.69 ns | 0.08 ns | 0.02 ns | 0.61 ns | ||
C×N | 10.68** | 3.09 ns | 1.31 ns | 1.48 ns | ||
W×N | 1.17 ns | 0.21 ns | 0.21 ns | 1.12 ns | ||
C×W×N | 1.62 ns | 2.12 ns | 3.41 ns | 0.12 ns |
根系性状 Root trait | 标准回归系数Standard regression coefficient | ||||||||
---|---|---|---|---|---|---|---|---|---|
拔节期 Jointing stage | 抽穗期Heading stage | 成熟期Maturity stage | |||||||
氮高效HN | 氮低效LN | 氮高效HN | 氮低效LN | 氮高效HN | 氮低效LN | ||||
根总干质量Total root dry weight | -0.0135 | -0.019 | 0.1875 | 0.1056 | -0.0679 | -0.0142 | |||
不定根Adventitious root | |||||||||
0.1110 | 0.0653 | 0.0698 | -0.0331 | 0.2415 | 0.4472 | ||||
0.2074 | 0.0538 | 0.0437 | 0.1587 | 0.0127 | 0.1910 | ||||
-0.1432 | -0.0422 | 0.0019 | -0.006 | 0.1872 | 0.0051 | ||||
粗分枝根Coarse lateral root | |||||||||
长度Length 表面积Surface area 体积Volume | 0.2971 | 0.1153 | 0.2625 | 0.0352 | -0.1532 | -0.0744 | |||
0.1718 | 0.2337 | 0.0138 | 0.0552 | 0.1450 | 0.2821 | ||||
-0.0805 | -0.1707 | 0.1236 | -0.0037 | -0.0953 | -0.2173 | ||||
细分枝根Fine lateral root | |||||||||
长度Length 表面积Surface area 体积Volume | 0.3316 | 0.4615 | 0.0512 | 0.0130 | 0.2036 | -0.2006 | |||
0.1496 | 0.1212 | -0.0216 | 0.3743 | 0.1022 | -0.0281 | ||||
-0.0537 | -0.0096 | 0.0144 | 0.1180 | -0.1059 | 0.0025 | ||||
决定系数Determination coefficient | 0.7204** | 0.6292** | 0.9009** | 0.9028** | 0.4587** | 0.4198** |
表7 不同氮效率水稻各生育期根系性状与产量的岭回归分析
Table 7 Ridge regression analysis between grain yield and root traits at different stages in rice with different N use efficiencies.
根系性状 Root trait | 标准回归系数Standard regression coefficient | ||||||||
---|---|---|---|---|---|---|---|---|---|
拔节期 Jointing stage | 抽穗期Heading stage | 成熟期Maturity stage | |||||||
氮高效HN | 氮低效LN | 氮高效HN | 氮低效LN | 氮高效HN | 氮低效LN | ||||
根总干质量Total root dry weight | -0.0135 | -0.019 | 0.1875 | 0.1056 | -0.0679 | -0.0142 | |||
不定根Adventitious root | |||||||||
0.1110 | 0.0653 | 0.0698 | -0.0331 | 0.2415 | 0.4472 | ||||
0.2074 | 0.0538 | 0.0437 | 0.1587 | 0.0127 | 0.1910 | ||||
-0.1432 | -0.0422 | 0.0019 | -0.006 | 0.1872 | 0.0051 | ||||
粗分枝根Coarse lateral root | |||||||||
长度Length 表面积Surface area 体积Volume | 0.2971 | 0.1153 | 0.2625 | 0.0352 | -0.1532 | -0.0744 | |||
0.1718 | 0.2337 | 0.0138 | 0.0552 | 0.1450 | 0.2821 | ||||
-0.0805 | -0.1707 | 0.1236 | -0.0037 | -0.0953 | -0.2173 | ||||
细分枝根Fine lateral root | |||||||||
长度Length 表面积Surface area 体积Volume | 0.3316 | 0.4615 | 0.0512 | 0.0130 | 0.2036 | -0.2006 | |||
0.1496 | 0.1212 | -0.0216 | 0.3743 | 0.1022 | -0.0281 | ||||
-0.0537 | -0.0096 | 0.0144 | 0.1180 | -0.1059 | 0.0025 | ||||
决定系数Determination coefficient | 0.7204** | 0.6292** | 0.9009** | 0.9028** | 0.4587** | 0.4198** |
氮素吸收利用 N accumulation and utilization | 决定系数 Determination coefficient | |||||||
---|---|---|---|---|---|---|---|---|
拔节期 Jointing stage | 抽穗期 Heading stage | 成熟期 Maturity stage | ||||||
氮高效HN | 氮低效LN | 氮高效HN | 氮低效LN | 氮高效HN | 氮低效LN | |||
氮积累量 N accumulation | 0.4596 | 0.4945 | 0.6892 | 0.6917 | 0.4036 | 0.4078 | ||
氮肥回收率 N recovery efficiency | 0.3801 | 0.4244 | 0.4491 | 0.5722 | 0.3437 | 0.4308 | ||
氮肥农学利用率 N agronomic efficiency efficiency | 0.3226 | 0.2638 | 0.3451 | 0.4263 | 0.3140 | 0.4197 | ||
氮肥生理利用率 N physiological efficiency efficiency | 0.0720 | 0.1077 | 0.2243 | 0.0928 | 0.2519 | 0.4161 |
表8 不同氮效率水稻各生育期根系性状与氮素吸收利用的岭回归分析
Table 8 Ridge regression analysis between root traits at different stages and N accumulation and utilization in rice with different N use efficiencies.
氮素吸收利用 N accumulation and utilization | 决定系数 Determination coefficient | |||||||
---|---|---|---|---|---|---|---|---|
拔节期 Jointing stage | 抽穗期 Heading stage | 成熟期 Maturity stage | ||||||
氮高效HN | 氮低效LN | 氮高效HN | 氮低效LN | 氮高效HN | 氮低效LN | |||
氮积累量 N accumulation | 0.4596 | 0.4945 | 0.6892 | 0.6917 | 0.4036 | 0.4078 | ||
氮肥回收率 N recovery efficiency | 0.3801 | 0.4244 | 0.4491 | 0.5722 | 0.3437 | 0.4308 | ||
氮肥农学利用率 N agronomic efficiency efficiency | 0.3226 | 0.2638 | 0.3451 | 0.4263 | 0.3140 | 0.4197 | ||
氮肥生理利用率 N physiological efficiency efficiency | 0.0720 | 0.1077 | 0.2243 | 0.0928 | 0.2519 | 0.4161 |
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