| Effects of different tillage practices on nutrient distribution in soil profile and crop yield in Weibei Highland |
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| DOI：10.7606/j.issn.1000-7601.2018.01.26 |
| Key Words: tillage measures soil nutrient wheat maize yield dark loessial soil Weibei Highland |
| Author Name | Affiliation | | YANG Yan | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | LIU Dan | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | ZHANG Xia | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | LI Zhong-hui | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | ZHAO Shi-xiang | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | LI Jun | College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China | | WANG Xu-dong | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Plant Nutrition and Agri-Environment in Northwest China, Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| The aim of the present study was to investigate the effect of different tillage measures on soil nutrient distribution and crop yield in Weibei Highland. An eight-year(2007—2015) field experiment with six tillage measures under wheat-maize rotation system was conducted. The tillage measures were as follows: no-tillage, subsoiling (NS); subsoiling, conventional tillage (SC); conventional tillage, no-tillage (CN); continuous no-tillage (NN); continuous sbusoiling (SS); conventional tillage (CC). The results showed that SS and NS treatments could promote soil total organic carbon (TOC), total nitrogen (TN), total phosphorus (TP), available phosphorus (AP) and available potassium (AK) on the surface of soil, which led a significant difference in soil nutrient between the surface soil (0～10 cm) and bottom soil (10～20 cm, 20～35 cm and 35～50 cm). However, CC and NN treatments had no significant effect on soil nutrient movement. For the top 50 cm soil layer, nitric nitrogen (NO3--N) content at the depth of 20～35 cm was higher than 10～20 cm and 35～50 cm soil layer, and compared with the SC, CN, NN, SS and NS treatments, CC treatment had the highest NO3--N content. However, soil ammonium nitrogen (NH4+-N) content was higher in the 10～20 cm soil layer and the maximum content of NH4+-N appeared in the NS treatment. In the SS treatment, had the highest total potassium on the surface of soil. The yield of maize and wheat in the NS treatment was the highest and significant higher than CC and NN treatments. |
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