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基于秸秆还田麦稻连作全年定位减量施肥试验的化肥减量增效研究
程秀洲
0
(潢川县农业技术推广中心)
摘要:
为了研究秸秆全部还田对减施化肥、增加经济效益的影响,开展了为期一年的麦-稻轮作秸秆全部还田化肥减量试验。试验设五个处理,分别是:秸秆不还田+常规施肥100%,秸秆还田+常规施肥100%、90%、80%、70%。试验结果表明,秸秆还田区土壤容重下降,土壤有机质和全氮含量高于秸秆不还田区;随着秸秆还田次数的增加,土壤中缓效钾含量增加,有效磷含量下降;秸秆还田有助于提高粮食产量、减少化肥施用量、提高经济效益。配合作物秸秆资源化利用,调整施肥结构,水稻土麦-稻全年连作区种植作物,可以适度减少化肥用量(10%左右),对促进耕地质量提升,化肥减量增效具有一定的现实意义。
关键词:  秸秆还田  化肥减量  麦-稻连作  经济效益
DOI:
投稿时间:2019-03-05修订日期:2019-03-05
基金项目:
Study on the Increase of Chemical Fertilizer Reduction and Efficiency Based on the Year-round Location Reduction Fertilization Test of Straw Returning to Field for Wheat-Rice Continuous Cropping
()
Abstract:
ABSTRACT: In order to study the effect of returning all straw to the field on reducing fertilizer application and increasing economic benefit, a one-year experiment on reducing chemical fertilizer by returning all straw to the field in wheat-rice rotation was carried out. Five treatments were set up in the experiment, which were: straw returning to field + conventional fertilization 100%, straw returning to field + conventional fertilization 100%, 90%, 80%, 70%. The results showed that the bulk density, organic matter and total nitrogen content of straw returning area were higher than those of non-straw returning area; with the increase of straw returning times, the slow-acting potassium content in soil increased, and the available phosphorus content decreased; straw returning area was helpful to increase grain yield, reduce fertilizer application and improve economic benefits. With the utilization of crop straw resources and the adjustment of fertilization structure, the amount of chemical fertilizer (about 10%) can be moderately reduced in wheat-rice continuous cropping area of paddy soil, which has certain practical significance in promoting the quality of cultivated land and increasing the efficiency of chemical fertilizer reduction.
Key words:  straw returning  fertilizer reduction  continuous cropping of wheat and rice  economic benefits

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