贵州湄潭茶园土壤肥力特征与评价

In 10 tea plantations of tea industry belts of Meitan county, Guizhou province, soil pH, organic matter (SOM), total nitrogen (N), available N, phosphorus (P) and potassium (K) were analyzed to study the present status of soil fertility in tea gardens in Meitan county, and provide basis for rational fertilization. The results in this study show that the pH value was4.89±0.11 on average which was suitable for tea growth. SOM, available P and K contents in the soil were the most suitable for tea growth, the average contents of SOM, available P and K were 26.44±3.33 gokg-1, 18.06±4.46 and 136.38±14.52 mgokg-1 respectively, reaching the national standards for environment quality of green food level Ⅲ. And the average contents of total N, available N were 1.83±0.26 gokg-1and 134.32±22.33 mgokg-1, reaching level Ⅱ belonged to rich status. However, the ratio of N, P and K was 1︰0.13︰1.02, which indicated that these tea plantations was a serious shortage of phosphorus. Therefore, it should be pay attention to scientific and balanced fertilization, in order to meet the needs of the application of P fertilizer and improve the yield and quality of tea plantations in Meitan county.