|Author:||Huang, LingFeng ; Liu, YiGuo ; Lin, Qi ; Li, JingTao|
|Book Group Author:||NA|
The effects of different supplemental irrigation schemes on nitrogen translation and high-yield wheat yield in the drylands of Qingdao (China) were investigated via field experiments. Increasing supplemental irrigation negatively influenced grain protein content, while grain protein content was highest under CK (control; dry land treatment). Grain protein accumulation under CK was lower than those under treatments with only one or two irrigations; however, obviously higher than those with four or five irrigations. Appropriate supplemental irrigation enhanced grain yield and nitrogen utilization efficiency, while nitrogen transfer rates and amounts were reduced under excessive irrigation. There was a non-significant yield difference between W4 (a three-time irrigation treatment at wintering, jointing and filling stages) and W3 (a two-time irrigation treatment at jointing and filling stages). With increasing frequency and volume of irrigation, wheat yield, 1000-grain weight and per-spike grain decrease accordingly. Based on yield, water use efficiency and grain protein accumulation under W2 at 120 mm irrigation at jointing and filling stages are optimum.
|Pages:||905 - 908|
|Journal:||Zhongguo Shengtai Nongye Xuebao / Chinese Journal ofEco-Agriculture|
crop yield, irrigation, irrigation systems, nitrogen, plantwater relations, protein content, water use efficiency, wheat, China,Triticum, Triticum aestivum, East Asia, Asia, Developing Countries,Triticum, Poaceae, Cyperales, monocotyledons, angiosperms,Spermatophyta, plants, eukaryotes, watering, Field Crops (FF005) (NewMarch 2000), Plant Production (FF100), Soil Chemistry and Mineralogy(JJ200), Soil Water Management (Irrigation and Drainage) (JJ800)(Revised June 2002) [formerly Soil Water Management]