中国水稻科学

中国水稻科学

• 研究报告 • 上一篇    下一篇

稻田年内水旱轮作对土壤肥力的影响

王人民;丁元树   

  1. 浙江农业大学农学系， 杭州310029
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1998-04-10 发布日期:1998-04-10

Effect of the Paddy-Upland Yearly Rotation on the Soil Fertility

Wang Renmin; Ding Yuanshu   

  • Received:1900-01-01 Revised:1900-01-01 Online:1998-04-10 Published:1998-04-10

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被引次数

66

摘要： 经过6年的稻田年内水旱轮作（两旱一水的麦-玉米-稻）和水水连作(麦-稻-稻)定位试验研究，结果表明随着种植年限增加,不论哪一种复种轮作方式均可使土壤有机质、全N、全P含量增加，并可以明显增加土壤速效N、P、K养分,也可使土壤物理性状得到改善，如土壤容重下降，孔隙度、尤其是非毛管孔隙增加,土壤固液相比减低。从两种不同种植方式来看，年内水水连作比年内水旱轮作更有利于土壤有机质和全N、全P含量增加,但年内水旱轮作的土壤速效N、P、K含量则比年内水水连作高。年内水旱轮作更有利于土壤物理性状的改善从而使土壤好气性微生物增加，厌气性微生物减少，土壤还原性物质含量下降。试验结果还表明年内水旱轮作使晚季稻田土壤速效养分明显增加，从而有利于晚稻的生长。

关键词: 稻田, 作物轮作, 土壤肥力

Abstract: With 6-year (from 1987 to 1993) long-term experiment, the effect of barley-rice-rice(BRR,CK) andbarle y-corn-rice (BCR ) cropping s ys tern on the soil fertility in Zhejiang Province were studied. The resulis showedthat the contents of organic matter, total N, total P, hydrolytic N, available P, and exchangeable K of paddy soil were significantly increased both in BRR and BCR treatment with cultivation year after year. Meanwhile, the soil physical properties were also improved. Compared with BCR treatment, BRR treatment is more benificial to increasing the contents of soil organic matter, total N and total P, but the contents of soil available P and exchangeable K were significantly higher in BCR treatment than those in BRR treatment. In additional, BCR treatment is more beneficial to improving soil physical properties than BRR treatment is. Therefore, compared with BRR treatment, BCR treatment could enhance the amount of aerobic microorganism and decrease the amount of anaerobic microorganism and the reductive matter. The result also showed that BCR treatment is more evidently in increasing the content ofquick active nutrients, N, P, K in late rice season than BRR treatment, then the late rice in BCR treatment grows quicker and better than in BRR treatment.

Key words: crop rotation, paddy field, soil fertility