【摘要】 <正> 腐殖酸类肥料是具有多种功能的肥料。它在改良土壤和刺激作物根系生长等方面有一定的效果。但是腐殖酸究竟能否“活化”磷矿粉中的磷,仍是一个争论的问题。近年来,随着腐殖酸类肥料的推广,又提出“解磷”的可能性。所谓“解磷”应包含两方面的意思:一是指腐殖酸与磷矿粉混合施用,在腐殖酸的作用下,使磷矿粉中更多还原

【Abstract】 Present article reports the effect of humic substances on the availability of rock phosphate to crop growth.Water culture experiments for wheat, tomato and rice were carried out with both ordinary rock phosphate and radioactive rock phosphate as phosphate sources.Experiments showed no evidence that the addition of sodium humate gave beneficial effect on the availability of phospbate from rock phosphate to crop growth. However, the stimulating effect of sodium humate on root growth can be observed in all cases.更多还原