An analysis of soil nutrient status of kiwifruit orchard in Qianjiang, Chongqing
Ming-Shu YAN1,2, Chun-Mei WU1, Li MENG3, Xiang-Lun DING4, Pan DONG4, Hai DENG1, Jia-Li LEI1, Yuan-Yuan GONG1, Li-Ran BAO1
1. Southeast Sichuan Geological Party, Chongqing Bureau of Geology and Minerals Exploration, Chongqing 400038, China 2. Chongqing Key Laboratory of Land Quality Geological Survey,Chongqing 400038, China 3. Chongqing Key Laboratory of Exogenic Mineralization and Mine Environment, Chongqing Institute of Geology and Mineral Resources, Chongqing 400042, China 4. School of Life Sciences, Chongqing University, Chongqing 400044, China
In order to fully understand the nutrient status of kiwifruit orchard soil in Qianjiang District of Chongqing City, the authors systematically analyzed soil pH, organic matter, cation exchange capacity, and total and effective content of plant nutrient and life elements in soil . The results show that the soil in Qianjiang kiwifruit orchards is moderate to acidic, rich in organic matter, with an average of 2.89%, but the cation exchange capacity of soil is relatively low, with 75% of the total samples in grade 4 (middle-poor) and 5 (poor) levels. The values of nitrogen, phosphorus and potassium in the orchard soil are generally good, but some of the samples have exceeded the suitable growth range of kiwifruit. The content of medium element Ca is deficient, while the content of medium element Mg is abundant in many areas. The content of trace elements Fe, Mn and Mo varies greatly in different sampling points. The soil in the study area is rich in Se on the whole. Based on the above analysis, it is suggested that, in the future fertilization process, more organic fertilizer should be applied to improve the content of organic matter and soil cation exchange capacity, the application of nitrogen fertilizer should be maintained or appropriately increased and the application of phosphorus and potassium fertilizer should be controlled. In addition, whether fertilization is necessary for tackling the deficiency of trace elements in soil needs further study.
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