余江县水稻土施用磷肥效果初报

江西省余江县水稻土面积约三十余万亩,其中红壤性水稻土面积最广,约占55%,冲积性水稻土约30%,冷浸性水稻土约15%。除部分肥力较高的冲积性水稻土合磷稍多外,普遍缺磷。近年来,我县大量推广各种化学磷肥,效果显著,如1962年粮食总产量比1961年增加8.5%,1963年虽遭严重旱虫在害,仍比1962年增产8%。

A REPORT ON THE APPLICATION OF INORGANIC PHOSPHORUS FERTILIZERS TO PADDY SOILS IN YÜKIANGHSIEN, KIANGSI PROVINCE

The paddy soils of Yükianghsien are generally deficient in phosphorus. Field experiments on application of phosphorus fertilizers nave the following results:1. Application of inorganic phosphorus fertilizers to Astragalus sinicus improved its growth and yield. The root system developed well;the number of nodules increased;the phosphorus content of the plant also increased significantly.2. In the field where Astragalus sinicus had been grown with dressing of phosphorus fertilizer,rice yielded higher than otherwise.3. Rice gave a higher yield with the same amount of phosphorus fertilizer applied to Astragalus sinicus prior to the rice crop than to the rice itself directly.It is therefore clear that to increase the yield of Astra,ealus stntcus by application of phosphotus fertilizers proves to be a very effective way of raising the yield of rice. And this has been carried out on large scale successfully in the people's communes.