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以采自山东的四种类型土壤40个土样为试材,研究土类,土壤理化条件及供锌状况对锌吸附固定的影响。结果表明,施入土壤的锌很快为土壤所吸附因定,吸附率随时间延长而增加。解吸试验表明,吸附时间越长,解吸率越低。不同种类土壤吸附率有差异,棕壤、潮土为54%,砂姜黑土、褐土为60%;土壤pH值影响到锌的有效性,从pH7.5始降,pH8.0为转折点,pH9又明显提高。土壤<0.01mm粘粒含量与锌吸附率间呈正相关。施磷肥可提高锌肥的有效性,其作用低限为施磷量100kg/亩,过多则效果相反。土壤水分状况的影响体现在湿土有效锌含量明显低于风干土,且有随土壤含水量增加有效锌降低的趋势。
40 soil samples collected from four types of soils in Shandong Province were used as test materials to study the effects of soil and soil physical and chemical conditions and zinc supply on zinc adsorption and fixation. The results showed that zinc applied to the soil was quickly absorbed by the soil and the adsorption rate increased with time. Desorption test showed that the longer the adsorption time, the lower the desorption rate. Different types of soil adsorption rates are different, brown soil, tidal soil is 54%, Shajiang black soil, cinnamon soil is 60%; soil pH value affects the effectiveness of zinc, starting from pH7.5, pH8.0 turning point, pH9 significantly improved. Soil <0.01mm clay content and zinc adsorption rate was positively correlated. Phosphate fertilizer can improve the effectiveness of zinc fertilizer, the role of the lower limit of phosphorus rate of 100kg / mu, too much, the opposite effect. The influence of soil moisture status is that the effective zinc content of wet soil is obviously lower than that of dry soil, and the available zinc decreases with the increase of soil water content.