• ISSN 1008-505X
  • CN 11-3996/S
RONG Qin-lei, LIANG Guo-qing, ZHOU Wei, LIU Dong-hai, WANG Xiu-bin, SUN Jing-wen, LI Shuang-lai, HU Cheng. Effects of different organic fertilization on fertility and enzyme activities of yellow clayey soil[J]. Journal of Plant Nutrition and Fertilizers, 2014, 20(5): 1168-1177. DOI: 10.11674/zwyf.2014.0513
Citation: RONG Qin-lei, LIANG Guo-qing, ZHOU Wei, LIU Dong-hai, WANG Xiu-bin, SUN Jing-wen, LI Shuang-lai, HU Cheng. Effects of different organic fertilization on fertility and enzyme activities of yellow clayey soil[J]. Journal of Plant Nutrition and Fertilizers, 2014, 20(5): 1168-1177. DOI: 10.11674/zwyf.2014.0513

Effects of different organic fertilization on fertility and enzyme activities of yellow clayey soil

  • 【Objectives】Low-yield yellow clayey soil, with the restrictive factor of poor soil maturation degree, was widely distributed in southern China. The application of organic fertilizers was an important measure for improving yellow clayey soil. Soil enzyme activity was an important indicator to characterize soil fertility. A field experiment was conducted to determine effects of chemical fertilizers and different organic fertilizers on soil fertility and soil enzyme activities of soil carbon, soil nitrogen, soil phosphorus transformation in yellow clay soil with low cropyields, which provided the theoretical and technique foundation for soil fertility improvement of yellow clay soil. 【Methods】 The experimental field was located in Jingshan County, Hubei Province with rice-rice rotation system. Six treatments were carried out in a field experiment: (1) No fertilizer (CK), (2) Chemical fertilizer (NPK), (3) NPK plus green manure(NPKG), (4) NPK plus pig manure(NPKM), (5) NPK plus straw(NPKS), (6) NPK plus straw and straw-decomposing inoculant(NPKSD). The same amount of chemical fertilizer was applied among fertilizer treatments. Every organic fertilizer treatment contained the same amount of organic carbon. After the rice harvest, soil nutrient and soil enzyme activity of topsoil in different treatments were measured to understand their variation characteristics. Adopted canonical correlation analysis, the correlation between the two sets of variables, soil nutrients and soil enzyme activities, was analyzed to investigate effect of fertility under different organic fertilizers application in low-yield yellow clayey soil.【Results】The results of the field experiment showed that the application of organic fertilizers could improve the contents of soil alkali-hydrolyzable N, available P and available K and the yields of early rice and late rice significantly. There is a great influence on soil enzyme activities by applying organic manure combination with chemical fertilizer. The activities of soil -glucosidase, -glucosidase, -cellobiosidase and -xylosidase are increased in different degrees, while the activities of soil phosphatase, phenol oxidase and N-acetyl-glucosamidase are declined, and the activities of soil urease and peroxidase are not significant different. Soil enzyme activities are important biological indicators to evaluate effects of the fertilization on soil fertility. The results of the canonical correlation analysis reveal that there is a significant correlation between soil enzyme activities and soil nutrients, and soil -glucosidase, -glucosidase, -cellobiosidase and -xylosidase activities are main enzymes to evaluate the change of soil fertility in yellow clay paddy soil. The canonical variables ordering result shows that the effect of organic fertilization on improving soil fertility is straw pig manure green manure.【Conclusions】Rice yield and soil available nutrients content were significantly improved after the application of organic manure, but different responses were observed among nine kinds soil enzyme activities in response to organic fertilizers. Low-yield yellow clayey soil fertility changes could be characterized by -glucosidase, -glucosidase, -cellobiosidase and -xylosidase activities. The effect of organic fertilization on improving soil fertility was straw pig manure green manure.
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