湖北省不同区域水稻土的养分状况

在湖北省鄂东南、鄂中、鄂北和江汉平原4个水稻生产区域,选择主要种植制度下有代表性的24个水稻土进行养分测试分析。结果表明,在湖北省的这4个区域里,土壤pH表现出从北向南逐渐降低的趋势;有机质、有效钙、镁、硫、铁、锰、铜以及硅的含量均较丰富;碱解氮、有效锌、硼普遍缺乏,其缺乏数分别占总样本的62.5%、62.5%和87.5%;速效磷、速效钾含量变异较大,从不同区域的结果来看,鄂东南和江汉平原的水稻土含磷量总体偏低,鄂中和鄂北区域较高,速效钾在鄂东南区域属极缺范围,鄂中属潜在缺乏,而鄂北和江汉平原均较丰富。此外,鄂东南和鄂中地区,有效钼含量缺乏。

Nutrient Status in Paddy Soils from Different Regions in Hubei Province

The soil nutrient contents in 24 soil samples which were collected from four main rice planting regionsof southeastern,middle and northern Hubei Province and Jianghan Plain were analyzed.The results showed that the soil pH gradually decreased from the north to the south in these regions.Soil organic matter,available Ca,Mg,S,Fe,Mn,Cu and Si were abundant,while available N,Zn and B were deficient,and the deficiency rates were 62.5%,62.5% and 87.5% respectively.The CV(coefficient of variation) of soil available P and K changed greatly.The results indicatedthat available P in southeastern Hubei and Jianghan Plain were lower than that in the north and middle regions.Available K in southeastern Hubei was more deficient than that in the north,while K was abundant in middle region and Jianghan Plain.Furthermore,available Mo was deficient in southeastern and middle regions of Hubei.