为了进一步提高旱地紫云英留种产量,围绕保花增荚,调节花荚期养分供应和分配,在前期施用磷、氮肥的基础上,探索花期喷施微量元素和生长激素对提高种子产量的效果。试验地设在本所溪口山果园,在柑桔树行间套种。供试品种为河南郑阳紫云英,十月十六日播种,采用撒播,亩播种量4斤,播后覆盖稻草。冬前苗期亩施钙镁磷肥20斤,开春后 In order to further improve the seed production of Astragalus sinicus in the dry land, the supply and distribution of nutrients during flowering and podding stages were adjusted around the pods and the phosphorus and nitrogen fertilizers were applied at the early stage to explore the effects of spraying microelement and growth hormone on the seed yield effect. Experimental site located in the Xikou mountain orchard, intercropping citrus tree line. The test varieties were Zhengyang, Yunnan Province Yunyin, sowing on October 16, using sowing, mu sowing 4 kg, after sowing covered straw. Pre-winter seedlings Mushi calcium magnesium phosphate 20 pounds, after the spring