Comprehensive evaluation of tobacco soil fertility in Fengdu County of Chongqing
Soil is the foundation of the healthy growth of tobacco,and the soil fertility of Fengdu tobacco planting area is tested and evaluated,which provides a theoretical basis for scientific fertilization and soil improvement in Fengdu tobacco planting area.Fuzzy mathematical model and principal component analysis method were used to comprehensively evaluate soil pH value,organic matter,alkali-hydrolyzable nitrogen,available P and available K contents in Taipingba Township,the main tobacco planting area of Fengdu.The alkali-hydrolyzable nitrogen content of Chongqing Fengdu tobacco planting soil was relatively suitable,and the content of organic matter,available P and available K was extremely rich,which was suitable for tobacco growth.Compared with 2020,the degree of soil acidification was improved in 2021,and the contents of organic matter,alkali-hydrolyzable nitrogen,available P and available K were increased.The distribution frequency of plots suitable for tobacco growth has been greatly improved.Compared with 2020,the soil proportions of soil suitable pH value and alkali-hydrolyzable nitrogen content increased to 53.66%and 78.05%,respectively,in 2021.The proportion of soil with higher organic matter content increased to 80.49%;The soil available P and available K content are higher than before.The comprehensive evaluation of soil fertility showed that the soil fertility of Fengdu tobacco planting was good,and there was no grade Ⅳ and Ⅴ.Among them,the comprehensive evaluation of soil fertility in 2021 was grade Ⅰ and Ⅱ,and the proportion of grade Ⅰ soil fertility areas increased from 74.29%(2020)to 84.80%(2021).The soil of tobacco planting in Fengdu,Chongqing is suitable for tobacco growth,and the soil nutrient content is high,but some plots are acidic.For application,it is necessary to pay attention to the rational application of organic fertilizer,improve the utilization rate of fertilizer,and adjust soil pH value according to local conditions.
万方数据
维普
