摘 要：
通过田间试验方法研究了不同控氮比掺混肥(非控、半控和全控)和运筹方式(基施、基施和追施结合)在玉米种植过程中对土壤速效磷、钾养分供应及其利用率的影响。结果表明:控氮比52.5%掺混肥在基施运筹方式下,能够保证玉米各生育阶段尤其是生长发育中后期的土壤磷、钾养分供应,其磷素利用率最高,与其他控氮比掺混肥及运筹方式相比,其磷素利用率提高了2.85%～95.55%。控氮比52.5%掺混肥在基施运筹方式下,与控氮比52.5%掺混肥减量基施处理相比,钾素利用率降低了1.47%,但与其他控氮比掺混肥及运筹方式相比,其钾素利用率提高了6.42%～20.11%。因此控氮比52.5%掺混肥基施在生产实践中能够更好地促进玉米对磷、钾养分的吸收与利用,提高肥料利用率。
译 名：
Effects of Bulk Blend Fertilizers with Different Controlled Nitrogen Ratios and Application Modes on Content of Soil Available-P,Available-K and P,K Fertilizer Use Efficiency
作 者：
ZHAO Jie1,SONG Fu-peng1,2,GAO Yang1,LU Yan-yan1(1.College of Recourses and Environment,Shandong Agricultural University,Taian,Shandong 271018;2.Chinese National Engineering Research Center for Slow/Controlled Release Fertilizers,State Key Laboratory of Crop Biology,Taian,Shandong 271018)
关键词：
ratio of controlled-release nitrogen;bulk blend fertilizers;P,K fertilizer use efficiency
摘 要：
A field experiment was conducted to study the effects of different ratios of controlled-release nitrogen in bulk blend fertilizers and N application modes on soil available nutrition contents,P,K fertilizer use efficiency.The results showed that the release of the 52.5% ratio of controlled-release bulk blend fertilizers in basal application mode accorded with requirement of maize better than the other treatments.Compared with the other applied fertilizers treatments,it increased P fertilizer use efficiency by 2.85%~95.55%.Compared with the highest K fertilizer use efficiency by 32.48%,the release of the 52.5% ratio of controlled-release bulk blend fertilizers in basal application mode just reduced by 1.47%,but compared with the other ratios of controlled-release nitrogen in bulk blend fertilizers and N application modes,it increased K fertilizer use efficiency by 6.42%~20.11%.
