Effects of wheat/alfalfa intercropping on soil nutrients
Journal Title: Scholars Journal of Agriculture and Veterinary Sciences - Year 2016, Vol 3, Issue 5
Abstract
Abstract:Soil organic matter, pH and nitrogen, phosphorus and potassium nutrients content and distribution characteristics on 2m depth profile of wheat, alfalfa and wheat /alfalfa intercropping was measured and analyzed through field experiment. Each treatment had a profile of soil organic matter distribution as S shape. The surface layer of 0-20cm soil organic matter content of XD (20g / kg) is slightly higher than the other two treatments; 0-60cm soil organic matter content ranked as XD> XMT> MD, while deep layer organic matter content of XMT was over XD (60-100cm) and MD (150-200cm), which may be convincing to the fact that alfalfa, described as a strong crop of deep roots, was further promoted down deeply roots distribution after intercropped with wheat. Soil pH value increased with depth deeper, the whole body is alkaline, and there was no significant difference between treatments. 0-20cm surface of treatments did not differ significantly in the total nitrogen content, while within 20-60cm soil depth MD and XMT’s total nitrogen content were significantly higher than XD’s; underlying XD’s available nitrogen accounted for 1/4 of profile. Wheat intercropping with alfalfa can not only help to improve the depth of 20-150cm soil nitrogen fertility, but also relief the problem of nitrogen loss at the bottom of wheat field. After a period of wheat consumption, XMT and XD surface soil available phosphorus content processing close 10 mg/kg, MD only 6.4210 mg/kg. Wheat/alfalfa intercropping system can optimized the whole long section of soil potassium consume ratio, so it can be applied less even no Potassium Fertilizer. Keywords: Wheat, Alfalfa, Intercropping, Soil Nutrients
Authors and Affiliations
ZHANG Xiao hong, DING Heng, ZHOU Zheng xiao, HE Ya nan
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