浦东新区果园村土壤养分状况评价及其空间变异分析

采用传统统计和地统计相结合的方法,对果园村农田耕层土壤养分进行了空间变异特征分析。结果表明:果园村土壤N、K养分供应不足,P的供应充足,且盈余较大。因此,果园村土壤养分管理以施N为主,平衡P、K,注意B肥使用。果园村土壤养分空间变异相关性拟合度较低,空间变异结构差异性不明显,说明其土壤养分空间变异性程度受人为因素的影响较大。果园村土壤N、P、K的最大相关距离在100～130m,这可作为村级土壤N、P、K养分分区管理中分区大小的依据。

The conditions evaluation and spatial variability analysis of soil nutrients in Guoyuan Village of Pudong New District

The spatial variability of arable layer soil nutrients of farmland in Guoyuan Village was analyzed by conventional statistics and geo-statistics.The results showed that the soil was short of N and K but much rich in P,so the soil management should mainly apply N fertilizer,balance P and K,and pay attention to B fertilizer use.The spatial variability of soil nutrients was relatively low in degree of fitting the correlation and inconspicuous in structural difference,which indicated that the spatial variability of soil nutrients was influenced largely by human factors.The maximum correlation distance of N,P and K in the soil was between 100-130 m,which could be used for reference in subdividing the zone size of village-level soil management of N,P and K nutrients.