淮北砂姜黑土有效锌含量和锌肥效应研究

对107个土样有效锌测定结果表明,淮北砂姜黑土是一种缺锌较严重的土壤(含量范围:0.13-0.83ppm,平均0.31ppm).大豆、水稻施用锌肥,增产10%-20%,其中尤以锌肥喷施效益最为显著,投入产出比高达1:68.40、1:83.25.施用磷肥能抑制大豆对锌的吸收,并与其施用量成正相关.

Available zinc content and zinc effectiveness of shajiang meadow soil in Hua-aibei

The results of measuring the soil available zinc content of 107 sa-mples from north Anhui have shown that the zinc deficiency symptom of shajiangmeadow soil is common and serious, the mean value by the DTPA method is0.31(0.31-0.83) ppm. The percentage increases of zinc fertilizer application tosoybean and rice is usually 10%-20%, and the ratio of input to output comes to 1:68.40 and1:83.25 by spray application respectively. However, the application ofphosphorous fertilizer can restrain the zinc absorption to soybean. and the effectis significantly correlated with the amonnt of P application.