Uptake of foliar or soil application of 15N-labelled urea solution at anthesis and its affect on wheat grain yield and protein.
Uptake of foliar or soil application of 15N-labelled urea solution at anthesis and its affect on wheat grain yield and protein.
复制标题
花期叶面或土壤施用 15N 标记尿素溶液的吸收及其对小麦籽粒产量和蛋白质的影响。
DOI：
10.4141/p99-098
复制
发表时间：
2000
影响因子：
1.2
通讯作者：
C. Grant
中科院分区：
文献类型：
--
作者：
C. Rawluk;G. Racz;C. Grant
通过两个生长室内试验，研究了15N标记尿素溶液开花期喷施对加拿大西部红春小麦籽粒氮肥利用率、籽粒蛋白质和籽粒产量的影响。叶面施15N标记尿素氮的回收率为4.5%~26.7%，土壤施15N标记尿素氮的回收率为32.3%~70.1%。用尿素酶抑制剂N-(正丁基)硫代磷酰胺(NBPT)改良尿素溶液，可提高试验中土壤施N的利用率。1，并不增加叶面施氮的利用率。在尿素溶液中加入非离子表面活性剂--壬基酚聚氧乙烯醚(NPE)，可使叶面施尿素的氮素利用率平均从10.6%提高到25.0%。土壤施尿素的籽粒蛋白质含量高于叶面施尿素。种植时增施氮肥既能增加籽粒蛋白质含量，又能提高产量，而开花期增施氮肥仅能提高蛋白质含量。尽管..。
Two growth chamber experiments were conducted to determine the effect of 15N-labelled urea solution foliar- or soil-applied at anthesis on recovery of fertilizer N in grain, grain protein and grain yield of Canadian Western Red Spring wheat (Triticum aestivum L.). Recovery of 15N-labelled urea-N in grain ranged from 4.5 to 26.7% with foliar application, and from 32.3 to 70.1% with soil application. Amending the urea solution with the urease inhibitor N-(n-butyl) thiophosphoric triamide (NBPT) improved recovery of soil-applied N in exp. 1 only and did not increase N recovery from foliar applications. Nitrogen recovery of foliar-applied urea was increased on average from 10.6 to 25.0% by adding nonyl phenol ethoxylates (NPE), a non-ionic surfactant, to the urea solution. Grain protein was higher when urea was applied to the soil than when applied to the foliage. Addition of N at planting increased both grain protein and yield while only protein was enhanced with fertilizer N applied at anthesis. Although wh...