Regionalization of the Abundance and Deficiency of the Farmland Soil Nutrients in Soil and Water Loss Region of Southern China Based on GISChinese Full Text
QI Yi;LI Jia-jia;ZHANG Li-ming;ZHOU Bi-qing;ZHANG Jin-biao;XING Shi-he;Fujian Agriculture and Forestry University;
Abstract: Understanding the soil nutrient abundant and deficient spatial distribution in the soil erosion area of cultivated land has great significance to carry out precise fertilization and soil and water conservation work.Taking Changting County of Fujian Province as a typical example of the red-soil erosion area in Southern China,based on the survey data of cultivated land capability and the current condition of soil erosion in recent years,using GIS and integrated mathematic models,the spatial soil nutrient abundant and deficient condition and differences between the soil erosion prevention and management were explored.The results showed that in the soil erosion prevention area,available phosphorus,exchangeable calcium and available zinc in the cultivated land were all at the rich level,alkali-hydrolyzable nitrogen,quick-acting potassium,exchangeable magnesium,and available sulphur at the rich or medium levels,and the cultivated land occupied more than 70% of the soil erosion prevention area.In the soil erosion management area,except for available phosphorus,exchangeable magnesium and available zinc,other soil nutrient elements were all at the medium level or deficient level.In general,the amount of soil nutrients in the soil erosion prevention area were higher than that in the soil erosion management area in Changting County,exchangeable calcium and magnesium were more than 100% higher,available boron and quick-acting potassium were more than 50% higher,and the other nutrients were at least 10% higher.The result shows that the soil nutrient content and the soil nutrient abundant and deficient spatial distribution are related with the degree of soil erosion,the heavier the degree of soil erosion is,the lower the amount of soil nutrition in the cultivated land is and the greater the difference of soil nutrient abundant and deficient spatial distribution is.The natural condition and the influence of human activities,which induce soil erosion,are the reasons for the difference.So to improve the soil fertility level is the key to soil and water conservation work.To explore the soil nutrient condition and the spatial distribution differences of soil nutrients has important significance to the promotion of cultivated land quality and soil and water conservation work.
- DOI：
10.13836/j.jjau.2014112
- Series：
- Subject：
- Classification Code：
S157.1
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