农业工程学报2011，Vol.27Issue(3)：43-48,6.DOI:10.3969/j.issn.1002-6819.2011.03.008
渭北旱塬不同秸秆覆盖量对土壤水分和春玉米产量的影响
Effects of different rates of straw mulch on soil moisture and yield of spring maize in Weibei Highland area of China
摘要
Abstract
A field experiment (2008-2009) was conducted at the Heyang Dryland Farming Experimental Station in Shaanxi Province of China to determine the effects of straw mulch rates on soil moisture and spring maize (Zea mays L.) yield. Maize straw at rates of 0 (CK), 4 500, 9 000 and 13 500 kg/hm2 was placed on field plots. The results indicated that the average soil water storage in the 0-200 cm soil layers under the three different rates of straw mulch were 16.52, 25.52 and 34.04 mm,respectively, significantly (P＜0.05) higher than that of CK, and the average field evapotranspiration (ET) in the 0-200 cm soil layers were 4.43, 8.23 and 6.96 mm, respectively, significantly (P＜0.05) lower than that of CK during 0-60 days after sowing.Besides, the average grain yield and water use efficiency (WUE) of the treatment with 9 000 kg/hm2 of straw mulch were optimal among the treatments, its grain yield and WUE increased by 11.03％ (P＜0.05) and 9.25％ (P＜0.05) compared with the CK, while it was medium with the treatment of 13 000 kg/hm2, and lowest with the treatment with 4 500 kg/hm2. It is suggested that the treatment with 9 000 kg/hm2 of straw mulch is preferable for Weibei highland area in China, as the precipitation is below than 390 mm during the maize growing season.关键词
土壤/含水率/秸秆/覆盖量/渭北旱塬/春玉米/产量Key words
soils/ moisture/ straw/ mulch rates/ Weibei Highland/ spring maize/ yield分类
农业科技引用本文复制引用
蔡太义,贾志宽,孟蕾,郭芳倩,杨宝平,黄耀威,任小龙..渭北旱塬不同秸秆覆盖量对土壤水分和春玉米产量的影响[J].农业工程学报,2011,27(3):43-48,6.基金项目
国家"十一五"科技支撑课题(2006BAD29B03) （2006BAD29B03）
渭北旱塬旱作农田集雨保水关键技术研究(2010NKC-03) （2010NKC-03）
