We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Effects of irrigation mode and N application rate on cotton field fertilizer N use efficiency and N losses.
- Authors
WANG Xiao-juan; WEI Chang-zhou; ZHANG Jun; DONG Peng; WANG Juan; ZHU Qi-chao; WANG Jin-xin
- Abstract
A field experiment was conducted to study the effects of different irrigation modes (drip irrigation and furrow irrigation) and different N application rates (0, 240, 360 and 480 kg N·hm-2) on the fertilizer N use efficiency and N losses in a cotton field in Xinjiang, Northwest China. The main N cycling pathways, such as the N uptake by cotton plant, NO3--N residual in soil, NH3 volatilization, NO3--N leaching, and nitrification denitrification, were quantitatively monitored. Compared with furrow irrigation, drip irrigation increased the seed cotton yield, plant N uptake, and fertilizer N use efficiency significantly. The NO3--N residual in soil was significantly greater under furrow irrigation than under drip irrigation. With the application of fertilizer N, the N loss from NH3 volatilization under drip irrigation occupied 0.06%-0.14% of applied N, and was significantly greater than that under furrow irrigation. The N loss from NO3--N leaching under drip irrigation and furrow irrigation was 4.4% and 8.8% of the applied N, respectively. Compared with furrow irrigation, drip irrigation could significantly decrease the NO3--N leakage rate in leakage water. The nitrification-dinetrification loss under drip irrigation and furrow irrigation was 17.9% and 16.8% of the applied N, respectively. It was suggested that NO3--N leaching and nitrification-denitrification were the main N losses in the cotton fields of Xinjiang.
- Subjects
WATER in agriculture; PLANT fibers; FURROW irrigation; NITRIFYING bacteria; FERTILIZERS; AGRICULTURAL chemicals
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2012, Vol 23, Issue 10, p2751
- ISSN
1001-9332
- Publication type
Article