磷石膏系列肥对水稻的增产效应及养分吸收的影响

Effect of phospbogypsum fertilizer series on the yield and the nutrient absorption of rice plant

研究表明：磷石膏系列肥可促进水稻前期生长，增加有效穗数，与对照相比可使水稻增产７％—１０％，增产效果为复微石膏＞磷石膏＞普通石膏，而且，施用磷石膏系列肥后可增加水稻体内含硫量，促进养分吸收和氮素的运转。在低硫土壤条件下以每公顷施３７５ｋｇ左右磷石膏系列肥为宜。

The study on the application of phosphogypsum fertilizer series to rice(Oryza sativa L.)showed that the fertilizers could increase the panicles and growth of rice in early stage, and enhance the yield by 7% 10%compared to the control.The highest effect on rice yield was brought by compounded micronutrient-phosphogypsum followed by phosphogypsum,The results demonstrated that phosphogysum could satisfiedly substitute for gypsum,and the application of phosphogypsum enhanced sulfur content,nutrient absorption,nitrogen translocation,and de-creased N/S ratio as maturing. The results also showed that the optimum amount of phosphogyp-sum applied to sulfur deficient soil was about 375 kg/hm￣2.