Analysis and Evaluation of Cultivated Land Quality in Guangxi Coastal Areas Based on Cultivated Land Quality Evaluation System
According to the national standard of Cultivated Land Quality Grade(GB/T33469-2016),the hier-archical analysis method was used to establish an evaluation system to evaluate the quality grade of 37.76 hm2 of cultivated land in the coastal area of Guangxi.The results showed that:the irrigation capacity and drainage capacity of the arable land in this area can meet the demand of crops for arable land;the biodiversity of the ar-able land and farmland forest network can basically meet the demand of crops for arable land;the soil pH val-ue is mainly between 4.5～5.5,which is a weakly acidic soil;the effective phosphorus content of the soil is mainly less than 15 mg/kg;and the quick-acting potassium content of the arable land is mainly between 100～125 mg/kg;Soil organic matter content is between 25～35 mg/kg.Weakly acidic soils in the region are more widely distributed;the effective phosphorus content of soils is low;the quick-acting potassium and organic matter contents of soils are medium.Cultivated land quality grades in the region can be divided into ten grades,and the proportion of the nominal value of the cultivated land quality grades from grade 1 to grade 10 is 1.09%,0.50%,4.66%,35.73%,43.80%,5.11%,3.84%,2.12%,2.33%and 0.82%,respective-ly,and the average cultivated land grade in the fifth grade,which has the largest area,is 4.82,and the soil quality of this place overall belongs to a high level.The high level of cultivated land in the region is mainly distributed in the northwestern and central regions;the medium level of cultivated land is mainly distributed in the western,eastern and central regions;and the low level of cultivated land is mainly distributed in the north-ern region.There is less arable land near the sea,and the closer it is to the sea,the poorer the quality of the arable land.Agronomic measures and methods,such as the rational application of fertilizers,the application of soil conditioners and the emphasis on formula fertilization,can be adopted to improve soil.
Coastal areaCultivated land qualityGrade evaluation
国家科技期刊平台
NSTL
万方数据
