Soil nutrient status and fertility quality evaluation of Bingdaowuzhai ancient tea garden in Shuangjiang county
The soil nutrient status and fertility quality of Bingdaowuzhai ancient tea garden in Shuangjiang county was studied,in order to provide scientific basis for the soil nutrient management of ancient tea garden.Eight soil nutrient indexes of pH,organic matter(OM),alkali-hydrolyzed nitrogen(AN),available phosphorus(AP),available potassium(AK),total nitrogen(TN),total phosphorus(TP)and total potassium(TK)of 105 soil samples from Bingdaowuzhai ancient tea garden were determined and their weights were measured by coefficient of variation method.The integrated fertility index was calculated by using the Fuzzy membership function model.Combined with correlation analysis and principal component analysis,the soil nutrients and fertility quality of Bingdaowuzhai ancient tea garden were comprehensively evaluated.The results showed that the soil pH value of Bingdaowuzhai ancient tea garden ranged from 4.70 to 6.16,with an average value of 5.45.The OM content ranged from 14.97 to 123.24 g/kg,and the OM content was abundant.The content of AN was 78.17-327.37 mg/kg,and 4.76%of the soil in Bingdaolaozhai and Nuowu were in gradeⅢ standard,which showed insufficient nitrogen supply.The AP content was sufficient,the content was between 10.35 and 474.54 mg/kg,and it was at a high level at Bingdaolaozhai.The AK content was 56.67-590.00 mg/kg,and it was generally low at Bawa,and for some soil it was deficient.The contents of TN,TP and TK ranged from 0.33 to 5.34 g/kg,4.68 to 22.38 g/kg and 14.94 to 45.41 g/kg,respectively.The contents of TP and TK were much higher than the standard of high-quality tea plantation.The results of correlation and principal component analysis showed that pH was correlated with the other 7 nutrients,and the contents of soil total and available nitrogen,phosphorus and potassium were significantly correlated.The contents of TP,AP,TN,AN and OM had great influence on soil comprehensive fertility.The soil nutrient contents of Bingdaowuzhai ancient tea garden were sufficient and the fertility quality level was high,in which the soil fertility quality level of Bingdaolaozhai was the best and the most stable.
Shuangjiang countyBingdaowuzhaiancient tea gardensoilnutrient statusquality of fertility
万方数据
维普
