根外追肥增产效果1958年湖北孝感专署农业试验站用1%浓度的过磷酸钙溶液,在早稻红脚早灌浆时(7月6日)进行根外喷磷对比试验,八个重复获得一致的增产效果,平均增产5.38%,千粒重平均增加0.45克,每斤粒数减少328粒(表1)。为了进一步证实这个结果,又用9个不同的品种(早粳16号、10509.荒三石、大黄谷,朱毛黄等)对双 In 1958, Hubei Xiaogan agency agricultural experiment station with 1% concentration of superphosphate solution, early rice red foot early grouting (July 6) to conduct comparative experiments of phosphorus in the root, eight repeated consistent The yield was increased by 5.38% on average, while the average grain weight was increased by 0.45 g and the number of grains per pound was reduced by 328 grains (Table 1). In order to further confirm this result, with nine different varieties (early japonica 16, 10,509. Three rocks, rhubarb Valley, Zhu Mao Huang) pairs of double