Study on Classification of Soil Nutrient Status of Sweet Potato in Chongqing
In this paper,the samples collected from 59 sweet potato growing areas of Jiang district in Chongqing were detected and analyzed. The results showed that the overall soil of sweet potato tended to be acid, of which 1/4 was suitable for the growing of sweet potato. The soil was relatively low at levels of organic matter, in which the content of organic natter under 20 g/kg accounted for 83.1 %.. The contents of total nitrogen and total potassium which were suitable for sweet potatoes were 69.5 % and 77.9 % , respectively, and took up 2/3 of the whole asmples. While the content of total phosphorus under <1.6g/kg was shout 66.1 % of soils in the range of lack of phosphorus. The content of available nitrogen,available potassium and available phosphorus in the range of deficitncy were 45.7% , 37.3 % and 66. 1 % ,respectively. The optimum range and rich range of exchangeable Ca, Mg were 11.9% and 66. 1 % ,27.1 % and 35.6 %, respectively. The soil available Cu, Zn, Fe and Mn were not in deficiency except for B.
Sweet potatoSoil nutrientsClassification for nutrients
NETL
NSTL
万方数据
维普
