土壤—水稻生态系统中重金属污染与施用磷肥关系分析

[目的]为在土壤-水稻生态系统中有效防控重金属污染及合理使用肥料提供理论依据。[方法]通过分析重金属及施用磷肥对水稻生长发育及其生态系统的影响，总结出磷肥的最佳施用量及水稻重金属污染的研究方向。[结果]适当施用磷肥能增加水稻产量，改善稻谷品质，加速水稻植株分蘖，促进幼穗分化、灌浆和籽粒饱满，提高作物的抗逆性。过量施用磷肥将会消耗作物内贮存的糖分和能量，诱发土壤缺锌，造成水稻缺硅症和缺钼症。过量重金属进入植物体内，会对植物细胞膜系统造成伤害，使其体内的各种生理生化过程发生紊乱，导致供给植物生长的物质和能量减少，进而抑制植物生长。[结论]该研究为防治施用磷肥导致的水稻重金属污染提供了理论依据。

Analysis on the Correlation between Heavy Metal Pollution and Phosphate Application in Soil-rice Ecosystem

[Objective] The research aimed to supply theoretical foundation for effectively controlling the heavy metal pollution and reasonably applying fertilizers in soil-rice ecosystem.[Method] Through analyzing the influences of heavy metal and phosphate application on the growth,development and ecosystem of rice,the optimum application amount of phosphate fertilizer and the research direction on heavy metal pollution in rice were summed up.[Result] The appropriate phosphate application could increase the yield of...