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为解决我省紫云英种植面积逐年下降，有机肥料投入不足的问题，必须寻找一种能持续稳定地提高土壤肥力的新途径。根据紫云英种子的特性，提出紫云英一次播种多年繁殖利用的设想，并在永泰县同安和沙县郊湖的单季稻田上，前后进行了5年的试验。实践证明这项技术措施是可行的［1
In order to solve the problem that the planting area of Astragalus membranaceus in our province is declining year by year and the input of organic fertilizers is insufficient, we must find a new way to increase soil fertility continuously and steadily. According to the characteristics of the seed of Asclepiad, a tentative plan was put forward that the seedlings of Asclepiadaceae were propagated and used for many years, and the test was carried out for five years before and after the single-season rice field in Tong’an and Shaxian Lake, Yongtai County. Practice has proved that this technical measure is feasible [1