摘要
为了探明安徽省沿江地区直播油菜的钾肥产量效应,采用田间试验方法,研究了不同钾肥用量对油菜产量、钾肥利用率和经济效益的影响。结果表明,施用钾肥对直播油菜有显著的增产效应。3个不同土壤肥力的试验田块均是以处理K120获得较高产量。提高钾肥用量,油菜的钾肥偏生产力和农学利用率均有降低的趋势。油菜施用钾肥后的经济效益显著,处理K120产值和施肥效益最高,分别为6556.61元/hm2和6052.61元/hm2。产投比以处理K60和K120较高,产投比均高于2.0。综合考虑油菜施用钾肥的产量和经济效益,本试验条件下,安徽省沿江地区以每公顷施用120kgK2O为最佳钾肥用量。
The research aimed to study effects of potassium supply on direct-seeding rapeseed yield, phosphorus recovery efficiency and economic benefits. The results indicated that potassium fertilizer could increase direct-seeding rapeseed yield significantly. Rapeseed yield was enhanced with the amount of K fertilizer added. The treatment K120 achieved the highest yield in the three test plots. With the increase of K application rate, partial factor productivity and K agronomic use efficiency were all decreased. The results also showed that K fertilizer significantly improved the economic benefits of direct-seeding rapeseed. The treatment of K120achieved the maximum income and net profit of 6556.61 yuan/hm2 and 6052.61 yuan/hm2, respectively. The value to cost ratio （VCR） of K60 and K120were higher than 2.0. We advise to take the treatment K120 as the optimum along the Yangtze River Regions in Anhui under the condition of this experiment.
出处
《中国农学通报》
CSCD
北大核心
2011年第33期104-107,共4页
Chinese Agricultural Science Bulletin
基金
国家"十一五"科技支撑计划重点项目"油菜高效简化施肥技术研究"(2010BAD01B05)
现代农业产业技术体系建设专项资金"油菜营养与施肥"(nycytx-005)
关键词
直播油菜
钾肥
产量
钾肥利用率
经济效益
direct-seeding rapeseed
K fertilizer
yield
potassium efficiency
profit
