Soil Nutrient Abundance and Deficiency in Yulong Tobacco-growing Area
In order to explore the nutrient status of tobacco-growing soil in Yulong tobacco-growing area of Jinsha River Basin,112 soil sam-ples were collected to analyze pH,organic matter,alkali-hydrolyzable nitrogen,available phosphorus,available potassium,water-soluble chlorine content and other indicators.The results showed that the average pH of soil in Yulong tobacco area was 6.77,the content of organic matter was 32.96 g/kg,the content of hydrolytic nitrogen was 123.44 mg/kg,the content of available phosphorus was 127.26 mg/kg,the content of avail-able potassium was 238.58 mg/kg,and the content of chloride ion was 18.44 mg/kg.Nutrient amplitude pH was 4.49-8.69,organic matter content was 5. 00-99. 70 g/kg,hydrolyzable nitrogen content was 13. 90-350. 00 mg/kg,available phosphorus content was 4. 10-383.40 mg/kg,available potassium content was 31.00-671.00 mg/kg,and chloride ion content was 0.78-96.88 mg/kg.The variation coeffi-cient of each nutrient from large to small is chloride ion>available phosphorus>hydrolytic nitrogen>organic matter>available potassium>pH val-ue,and the variation of each nutrient is strong,indicating that the soil environment of Yulong tobacco planting is complex and diverse.The nu-trient content of tobacco-growing soil in Yulong was rich and unevenly distributed.The production measures should be based on reducing soil phosphorus,regulating potassium fertilizer,and taking into account nitrogen fertilizer application.
万方数据
维普
