干旱地区农业研究2011，Vol.29Issue(5)：19-25,7.
渭北旱塬区不同栽培模式对小麦产量与土壤水分及硝态氮累积的影响
Effects of different cultivation modes on soil water, yield and NO3 - N accumulation in Weibei Loess Plateau
摘要
Abstract
Water shortage was the key factor of restraining winter wheat yield in Weibei Loess Plateau, so it was meaningful to search reasonable cultivation models to improve water use efficiency and yield of winter wheat. A two-year field experiment was conducted to investigate the effect of different cultivation modes on soil water dynamic variation and N03 - N accumulation in soil layer of 0 - 200 cm. The results showed that recommended fertilization + plastic mulch on soil ridges + straw mulch in furrow (NP + PF + S) treatment and recommended fertilization + plastic mulch on soil ridges ( NP + PF) treatment significantly increased 0 ~ 2 m soil water storage during the growing season, especially in the second year. The water storage under 100 cm soil increased obviously in the two ridge cultivation modes, so enough soil water was provided for winter wheat growth during the dry spring season, especially in the critical water demand stage. The water use efficiency of the two ridge cultures were the highest among all the treatments. In the CK2 treatment, NO3 - N was significantly accumulated in soil layer of 0 ~ 200 cm. More fertilizer application involved more NO3 - N residue in the soil. In the second season of Yuan surface, the accumulation below 100 cm soil was bigger in the CK2 and NP + S treatments, and in the terrace, the biggest accumulation appeared in the NP + PF + S. Compared to the other treatments, spike per mu in NP+ PF + S and NP + PF was lower, however, the other yield component factors were higher, especially the grain per spike and spike length. In conclusion, NP + PF + S and NP + PF was suitable to the agricultural development in the rainfed region of Weibei Loeass Plateau.关键词
渭北旱塬区/冬小麦/土壤水分/硝态氮/产量Key words
Weibei Loess Plateau/ winter wheat/ soil water/ NO3 - N accumulation/ wheat yield分类
农业科技引用本文复制引用
陈辉林,刘廷,田霄鸿,赵爱青,王朝辉..渭北旱塬区不同栽培模式对小麦产量与土壤水分及硝态氮累积的影响[J].干旱地区农业研究,2011,29(5):19-25,7.基金项目
国家“十一五”科技支撑计划项目(2006BAD25B09、2007BAD89B16) （2006BAD25B09、2007BAD89B16）
