干旱地区农业研究2016，Vol.34Issue(4)：159-164,6.DOI:10.7606/j.issn.1000-7601.2016.04.24
不同控氮比掺混肥对土壤无机氮与脲酶及冬小麦产量的影响
Effects of bulk blend fertilizers with different controlled nitrogen ratios on the soil inorganic nitrogen,urease and winter wheat yield
摘要
Abstract
To reveal the effect of different application of controlled release nitrogen fertilizer combined with urea on the soil inorganic nitrogen ,urease and winter wheat yield ,we carried out the field experiment aimed at studying the opti-mum combination of controlled release nitrogen fertilizer and conventional urea and thereby putting forward proposal for reducing nitrogen fertilizer loss and non-point source pollution ,and saving cost as well .The results showed that compared with urea ,combination application of controlled release nitrogen fertilizer and urea treatment had less influence on soil NH4+ -N contents .At wheat tillering stage ,urea treated soil NO3- -N contents and urease were more active .By con-trast ,soil NO3- -N contents and urease activity were higher by combination of urea and 40% controlled release nitrogen fertilizer at the later growth stage .Nitrogen fertilizer treatments had a little influence on the grain number per panicle and the 1000-weight of wheat . While 60% urea blended with 40% controlled release nitrogen fertilizer (40% CRU ) in-creased grain yield significantly ,as high as 14% compared with urea treatment .As the output value was the highest ,in-put cost was moderate ,the net income level and output/input ratio were the highest ,respectively ,5 875 .72 yuan·hm-2 and 2 .24 ,compared with the urea treatment increased by 23 .24% and 9 .27% .In conclusion ,the combined applica-tion of 40% controlled release nitrogen fertilizer with 60% conventional urea was the optimum ratio with the beneficial ef-fect of improving soil inorganic nitrogen contents ,activating the urease activity during the later growth stage of wheat ,and increasing the yield of winter wheat .关键词
冬小麦/掺混氮肥/无机氮/脲酶/产量Key words
winter wheat/bulk blending nitrogen fertilizer/inorganic nitrogen/urea/yield分类
农业科技引用本文复制引用
张敬,李冰,王昌全,尹斌,向毫,付月君,谢一平..不同控氮比掺混肥对土壤无机氮与脲酶及冬小麦产量的影响[J].干旱地区农业研究,2016,34(4):159-164,6.基金项目
国家科技支撑计划（2013BAD07B13），四川省科技支撑计划 （）
