Apparent Budget of Soil Nitrogen, Nitrogen-use Efficiency and Water-use Efficiency as Affected by N Fertilization on Summer Maize in Wuqiao, North China Plain
Two maize cultivars (Zhengdan958 and Nongdal08) were planted with 3 types of N fertilizers at 3 application rates (0, 90 and 180kg N ha-l) with 3 replications. Yield and water-use efficiency (WUE) were increased by increasing N application rates, whereas nitrogen use efficiency (NUE) was reduced. WUE was significantly and slightly improved by applying compound fertilizer, whereas coated urea showed the least effect on improving WUE for both cultivars. Clear genotype differences on WUE and NUE were observed. WUE of Zhengdan958 was greater than Nongdal08, and NUE of Nongdal08 was better. Soil N deficit (SND) was observed in all treatments after summer maize, and the application of N fertilizer could alleviate the extent of deficit. The SND of Zhengdan958 was greater of Nongdal08. The SND was the highest with compound fertilizer and lowest with urea.
Summer maize Nitrogen fertilizer N application rate Water-use efficiency Nitrogen-use efficiency Soil N budget
Zhenxie Yi Hongbin Tao Yaping Wei Ming Liu Lihua Lu Fengtong Wei Pu Wang
College of Agronomy and Biotechnology, China Agricultural University, Beijing 100094, P. R. China
国际会议
第九届亚洲玉米大会(the Ninth Asian Regional Maize Workshop)
北京
英文
171-174
2005-09-05（万方平台首次上网日期，不代表论文的发表时间）