论文部分内容阅读
根据对肥田萝卜和小麦生长于不同Ｐ 处理下的网膜分隔三室及二室模拟栽培系统的试验，分析了肥田萝卜和小麦对酸性土壤上低品位磷矿粉不同处理的吸收效果．结果表明，肥田萝卜对磷矿粉的吸收受到根系活动范围的限制，它可以有效利用施在根室区的低品位磷矿粉，干物重增加幅度达２３３ ％ ，比对照有极显著的提高；不论根室区是否施磷矿粉，肥田萝卜对于施在外室区（ 与根室区用网膜相隔） 的低品位磷矿粉都具有微弱的利用能力，认为这是少量渗入到外室的根分泌的有机酸的活化作用．不过肥田萝卜对这一部分Ｐ 的利用量不足以显著提高植株的干物重；小麦对于施在根室或外室区的低品位磷矿粉均不能有效利用
According to the experiments on the separation of three-compartment and two-compartment simulated cultivation system of oat radish and wheat grown under different P treatments, the effects of different treatments of low-grade phosphate rock on the acid soil were analyzed. The results showed that the absorption of phosphate rock by fertilizer was limited by the range of root activity. It could effectively utilize the low-grade phosphate rock powder applied in the root zone and the increase of dry weight was 233%, which was significantly higher than that of the control ; Irrespective of whether the phosphate rock powder is applied in the root chamber area, the low yield phosphate rock powder applied to the outer compartment zone (separated from the root compartment zone by the omentum) has the weak utilization ability, which is regarded as a small amount of root excretion into the outer compartment The activation of organic acids. However, the utilization of P in part of Radish was not enough to increase the dry weight of plants significantly. Wheat could not be effectively used for low-grade phosphate rock