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Position: Home > Articles > Economic Benefit of Potash Operated in Rice-wheat Rotation Jiangsu Journal of Agricultural Sciences 2000,16 (2) 105-110

稻麦轮作制中的钾肥运筹效益

作  者:
朱培立;黄东迈;余晓鹤;王家骧;储国良;顾志权
单  位:
江苏丘陵地区镇江农科所;江苏省农业科学院土壤肥料研究所;加拿大钾磷肥研究所;江苏省张家港市土肥站
关键词:
稻麦轮作;钾肥残效;钾肥效益
摘  要:
在江苏稻麦轮作一年两熟制地区的淋溶土和新成土上 ,连续两年进行钾肥运筹田间试验。结果表明 :钾肥无论在稻季或麦季施用 ,均有较好的增产效果 ,小麦的增产幅度大于水稻 ;钾肥的残留效应较大 ,可与当季增产效果类比 ,残效氮和残效钾之间有明显的交互作用 ;在稻麦轮作制中 ,钾肥麦季施用稻季不施用的运筹方式 ,钾肥的当季肥效、后季残效、年总产、钾素生产力及产 /投值均高于钾肥稻季施用麦季不施用的运筹方式。指出以水稻为主的稻麦两熟地区 ,评价钾肥效益应以轮作周期为基础。
译  名:
Economic Benefit of Potash Operated in Rice-wheat Rotation
作  者:
ZHU Peili, 1HUANG Dongmai, 1YU Xiaohe, 2WANG Jason, 3CHU Guoliang, 4GU Zhiquan ( 1Institute of Soil and Fertilizer,Jiangsu Academy of Agricultural Sciences,Nanjing210014; 2Potash and Phosphorus Institute of Canada,Ca
关键词:
rice-wheat rotation;residual effect of potash;economic benefit of potash
摘  要:
Two successive years field trials were conducted in alfisol and entisol areas in Jiangsu province where rice-wheat rotation was adopted to study how to use limited K fertilizer most efficiently.Results showed that grain yield responded to K no matter how much K was applied to both rice and wheat,with the yield increment of wheat being greater than that of rice.Residual effect of K was greater,being similar to its effect on yield increase of current crop.There existed marked interaction between residual N and residual K.In rice-wheat rotation,K applied to wheat only could produce greater effect on current crop,residual effect,annual yield,productivity of potash,and value of cost ratio than those with K applied to rice only.The paper also revealed that economic benefit of applied K should be evaluated on the basis of the rotation period in the rice-wheat cropping areas.

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