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一、前言我们从1982年正式立题开始稀土元素在西瓜上应用的研究。通过连续三年的西瓜施用稀土的小区试验和四年一千亩的大田试验示范结果表明。“西瓜合理喷施稀土有明显
First, the foreword We started from the 1982 formal legislation on the application of rare earth elements in watermelon. Through three consecutive years of watermelon application of rare earth plot test and four years of one thousand acres of field trials demonstration results. "Watermelon spraying rare earth obvious