和田县玉米测土配方施肥土壤养分校正系数研究

Study on Soil Nutrient Correction Coefficient of Soil Testing and Formulated Fertilization for Maize Culture in Hetian County

针对和田县玉米生产中存在的盲目施肥等问题,本研究利用测土配方施肥试验方案中缺肥区试验数据,对和田县5个乡镇的高、中、低产田的土壤养分校正系数进行了研究。试验结果表明,和田县土壤养分校正系数(y)随土壤养分含量(x)的增加而降低,并且二者间存在函数关系,即y=a+bLnx。土壤氮素、磷素和钾素养分有效系数与土壤碱解氮、速效磷(P2O5)和速效钾(K2O)的函数方程分别为:y=1.67-0.24Lnx,y=4.34-1.02Lnx和y=2.62-0.42Lnx。根据函数方程,计算出和田县不同肥力土壤所对应的土壤养分校正系数。

The main aims of this research was to analyze the soil nutrient correction coefficient of soil tes- ting and formulated fertilizer in the field with high, medium and low yields in five townships and to study the test data obtained in the soil testing and formulated fertilizer for correction of blinding apply fertilizer in maize production of Hetian County. The results showed that soil nutrient correction coefficient decreased with increase in soil nutrient contents. There existed the function relations between soil nutrient correction coefficient and soil nutrient contents, which can be expressed as follows, y = a q- bLnx. The function ex- pressions of soil nitrogen correction coefficient and alkaline hydrolytic nitrogen was y = 1.67--0.24Lnx , while soil phosphorus correction coefficient and available phosphorus was y = 4.34--1.02Lnx , soil potassi- um correction coefficient and available potassium was y =2.62-0.42Lnx. According to these functions, soil nutrient correlation coefficients can be obtained in different fertility soils in Hetian County.