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双季稻田改制对作物生长及土壤养分的影响 被引量:30

Effects of Cropping System Change for Paddy Field with Double Harvest Rice on the Crops Growth and Soil Nutrient
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摘要 【目的】探讨红壤地区双季稻田改制对作物生长及土壤养分变化的影响,为灌溉条件较差稻田种植制度改革提供有效模式。【方法】利用田间定位试验方法,研究了双季稻田改种牧草、水旱轮作及旱作等模式对作物生长、产量和经济效益的影响,并分析了土壤有机质和养分含量的变化。【结果】按各处理生产产品的市场价格进行折算,稻田改制可增加产值、提高产投比。各处理比较,以水旱轮作产值最高,分别比对照、牧草和旱作处理增加34.7%、21.4%和2.2%,且牧草和旱作处理也分别较对照增加了11.0%和31.8%;牧草、水旱轮作和旱作处理产投比值分别比对照高0.9、0.6和0.3。种植牧草对提高土壤有机质和全氮、全磷及速效磷含量有较好效果,但各处理土壤碱解氮、全钾、速效钾的含量均有一定幅度下降,说明在本研究的施肥水平下,有必要增加氮素、特别是钾素养分的投入。【结论】在当前红壤地区双季稻田肥力状况、气候及作物栽培管理条件下,对灌溉条件较差的稻田进行改制是可行的,其中,种植牧草或实行水旱轮作对提高经济效益、提升土壤肥力有较好效果。 【Objective】This paper aimed to determine the effects of cropping system change for red soil paddy field with double harvest rice on crops growth and soil nutrient. It also aimed to provide with optimum pattern for cropping system reform under bad irrigation condition. 【Method】Through located field experiments, effects on crops growth, yield and economic benefit were studied under different cropping systems. These included systems from paddy field with double harvest rice to pasture, paddy-upland rotation, u...
出处 《中国农业科学》 CAS CSCD 北大核心 2007年第6期1198-1205,共8页 Scientia Agricultura Sinica
基金 国家"十五"科技攻关项目(2001BA507A17 2004BA516A19) 国家"十五"科技支撑计划(2006BAD05B01)项目
关键词 种植制度 作物生长 经济效益 土壤养分 Cropping system Crop growth Economic benefit Soil nutrient
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参考文献4

  • 1[19]Prasad R,Gangaiah B.Effect of crop residue management in rice-wheat cropping system on growth and yield of crops and on soil fertility.Experimental Agriculture,1999,34:427-435.
  • 2[20]Phillips I R.Phosphorus availability and sorption under alternating waterlogged and drying conditions.Communications in Soil Science and Plant Analysis,1999,29(19/20):3045-3059.
  • 3[21]Phillips I R.Nitrogen availability and sorption under alternation waterlogged and drying conditions.Communications in Soil Science and Plant Analysis,1999,30(1/2):1-20.
  • 4[22]Nguyen my hoa,Upendra Singh.Potassium supplying capacity of some lowland rice soils in the Mekong Delta.Better Crops International,1998,12(1):11-15.

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