Effects of Irrigation and Nitrogen-sulfur Combined Application on Grain Yield and Water Use Efficiency in Winter Wheat
LIU Chao
ZHANG Guozhao
ZHU Huijie
ZHU Yunji
Abstract：A field experiment was carried out to study the effect of irrigation and nitrogen-sulfur combined application on grain yield and water usage efficiency in winter wheat. The treatments were:no irrigation (W0),irrigation at jointing stage(W1),irrigation at both jointing and flowering stages(W2),applying 52. 5 kg/ha nitrogen as CK(N0),applying 180 kg/ha nitrogen(N180),no sulfur as CK(S0),and applying 60 kg/ha sulfur (S60). Results showed that,with the increase of irrigation frequency,the grain yield and water consumption increased significantly. In the condition of water deficit,the application of nitrogen and sulfur could increase the dry matter accumulation and grain yield,and promote the transportation and distribution of dry matter accumulated before the anthesis into the grain. The irrigation and nitrogen-sulfur combined ap-plication could promote the transportation of after-anthesis dry matter into the grain. The combined applica-tion of sulfur and nitrogen had great difference in water utilization with different moisture conditions. The proper decrease of irrigation (W1) could obviously improve the water use efficiency,compared with no irri-gation (W0). Compared with the W2,increasing nitrogen and sulfur application could increase the con-sumption of soil water. Appropriately reducing the irrigation and increasing the sulfur and nitrogen could not only reduce the invalid irrigation consumption,but also improve the utilization efficiency of precipitation and soil storage water,so as to increase both the grain yield and the water utilization efficiency.
Keywords：winter wheatirrigationnitrogen-sulfur combined applicationdry matter accumulationgrain yieldwater utilization
Publication Date：2015-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 13-18 )