| Effects of different cultivation modes on soil water, yield and NO3-N accumulation in Weibei Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2011.05.04 |
| Key Words: Weibei Loess Plateau winter wheat soil water NO3-N accumulation wheat yield |
| Author Name | Affiliation | | CHEN Huilin | College of Resources and Environment, Key Lab for Agricultural Resources and Environmental Remediation in Loess Plateau of Agriculture Ministry of China, Northwest A & F University, Yangling Shaanxi 712100, China | | LIU Ting | College of Resources and Environment, Key Lab for Agricultural Resources and Environmental Remediation in Loess Plateau of Agriculture Ministry of China, Northwest A & F University, Yangling Shaanxi 712100, China | | TIAN Xiaohong | College of Resources and Environment, Key Lab for Agricultural Resources and Environmental Remediation in Loess Plateau of Agriculture Ministry of China, Northwest A & F University, Yangling Shaanxi 712100, China | | ZHAO Aiqing | College of Resources and Environment, Key Lab for Agricultural Resources and Environmental Remediation in Loess Plateau of Agriculture Ministry of China, Northwest A & F University, Yangling Shaanxi 712100, China | | WANG Zhaohui | College of Resources and Environment, Key Lab for Agricultural Resources and Environmental Remediation in Loess Plateau of Agriculture Ministry of China, Northwest A & F University, Yangling Shaanxi 712100, China |
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| 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 NO3-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 t
he 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. |
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