云南勐海县主要古茶园土壤养分状况分析.

[Objective]This paper aimed to grasp the difference of soil nutrient content among die ancient lea gardens in Menghai county and provide a scientific basis for their soil nutrient management, which will help the county § tea production to achieve high-efficiency, high-quality and ecological goals. [Method] A total of 9 representative ancient lea gardens in Menghai county were selected for soil sampling, and the results were analyzed comprehensively. [Result] The pH value of 66.7% of the ancient tea gardens soil was 4.5 -5.5, and 33.3 % was lower than 4.5; the organic matter content of 22.2% of the ancient lea gardens was higher than 30 g/kg, and 77.8 % was between 10 g/kg and 30 g/kg; all the alkali-hydrolyzed nitrogen content exceeded 120 mg/kg; the available phosphorus content of 88.9 % of the ancient tea gardens was less than 3 mg/kg; the available potassium content of 66.7% of the ancient tea gardens was less than 50 mg/kg. [Conclusion] In the soil of the ancient lea gardens, the pH value of some tea plantations was lower than 4.5; the contents of organic matter and alkali-hydrolyzed nitrogen were relatively rich; the contents of available phosphorus and available potassium were relatively deficient. We should give full play to all kinds of organic fertilizer resources, increase the soil fertility of ancient lea gardens, use good soil testing and formula fertilization technology, improve the soil nutrient structure and pH value of ancient tea gardens, and ensure that there are reasonable and efficient soil nutrient banks in ancient lea gardens. [ABSTRACT FROM AUTHOR]