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[Objective】 The objective of the paper is to explore the response mechanismof soil nutrients in economic fruit woodland to different intercropping and mono-cropping patterns in rocky desertification control area and to provide the scientific basis for vegetation optimization and soil nutrient supply of economic fruit woodland (Rosa roxburgMi and Juglans reiiia) in rocky desertification control area. ' Method】 The resjDonse of soil nutrients in economic fruit woodland to cropping patems in rocky desertification control area was stiadied by single-factor vari¬ance ，factor and sort-l)ased analysis combined witli fiel(d sampling and conventional soil nutrient analysis. ' Result】 The content of soil nutri¬ents showed a decreasing trend but soil pHincreased with increase of soil depth. Total N，total P，available P and available K content in soil withi diferent depth under Rosa roxburghii-Juglans reigia intercropping patem were higher than that under Rosa roxburghii mono-cropping pattern significantly (%<0. 05) . Total Kand available N content of soil with different depth under Roa rxburg"i mono-cropping pattern were higher thian that under Rosa roxburghii-Juglans reigia intercropping patern significantly (% <0. 05). Organic matter content of soil with 0-10 cm depth under Rosa roxburghii-Juglans reigia intercropping patern was higher than that under Rosa roxburghii mono-cropping patern but organic matter content of soil with > 10 cm depth under Rosa roxburghii-Juglans reigia intercropping patern was lower than that under Rosa roxburghii mono-cropping patem signiicantly (% <0. 05). The soil nutrient supply level under Rosa roxburghii-Juglans reigia inter¬ cropping patem (0.572) was higher thian under Rosa roxburghii mono-cropping patern (0. 439). Total K，organic matter，available N available K were main factors influencing soil nutrient supply level in the research area. ' Conclusion 】The response of soil nutrients in economic friait woodland to intercropping and mono¬cropping patems is sensitive in rocky desertification control area. The Rosa roxburghii-Juglans re^gia intercropping pattern and Roa roburghh mono-cropping pattern can consolidate and maintain the supply level of soil nutrient content in intercrop¬ping woodland and supplement soil nutrients in mono-cropping woodland for improving its supply level. [ABSTRACT FROM AUTHOR]

[Objective] The aim of this paper is to fully understand the temporal and spatial variation of soil nutrient in the cultivated land in Kunming district. [Method] Based on the analysis of 3907 farmland soil samples collected from 7 counties in Dianehi district of Kunming city, combined with ‘3S’ technology, the spatial distribution and change of soil nutrient content of farmland in Kunming city were studied. [Result] The results showed that the area with medium available boron content in the cultivated land in Dianehi district of Kunming city accounted for 70.08%, and the area with deficient available boron content accounted for 28.29%. The area with medium available zinc content accounted for 63.18% . Most areas of other nutrients were rich or more abundant. According to the average value of soil nutrient, the total nitrogen and alkali hvdrolysable nitrogen in the Dianehi district of Kunming city reached a rich level, while the organic matter, available phosphorus and available potassium were rich. Except for available boron, the average contents of effective manganese, effective zinc and effective molybdenum of trace elements were in high or higher level. The nutrient contents of vegetable land and seasonal vegetable land were higher than that of the dry land of fruit trees. [Conclusion]The total nutrient content of arable soil in Dianehi district of Kunming city is rich. Compared with the second national soil survey data, the contents of soil organic matter, total nitrogen, alkali hvdrolysable nitrogen, a-vailable phosphorus and available potassium are generally increasing. In the process of fertilization, it is necessary to combine the technology of improving the soil quality of cultivated land to achieve precise fertilization, and improve the utilization rale of fertilizer and the ability of soil fertilizer supply. [ABSTRACT FROM AUTHOR]