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采集67个县市耕地土样587个进行微量元素全量和有效量分析.结果表明,锌、锰、铜、硼、钼和铁的全量平均为69.8,447,21.4,58.9,0.70ppm和2.33%;有效量平均为0.54,7.7,0.80,0.40,0.60ppm和5ppm.丰缺程度受土壤类型、土壤理化性质和耕作栽培措施等影响.871组微肥田间试验资料统计,微肥增产机率67.6%,平均增产率12.1%,其中锌、硼、锰、钼的增产机率高,增产幅度大;铁肥增产机率较低;铜肥表现不佳.1984年施用微肥示范田26万亩,玉米施锌增产11.5%,谷子增产26%,莜麦增产16.8%;棉花施硼增产15.6%,谷子增产12.2%;豆类施钼增产22%,经济效益显著.
A total of 587 soil samples from 67 counties were collected for total and trace element analysis of trace elements.The results showed that the total contents of zinc, manganese, copper, boron, molybdenum and iron were 69.8, 447, 21.4, 58.9, 0.70ppm and 2.33% ; The effective amount averaged 0.54, 7.7, 0.80, 0.40, 0.60ppm and 5ppm.The degree of abundance and deficiency were affected by soil type, soil physical and chemical properties and tillage and cultivation measures, etc. According to the field test data of 871 groups, the rate of increasing micronutrient yield was 67.6% , The average rate of increase of 12.1%, of which zinc, boron, manganese, molybdenum production of a high probability of increase, increase yield; iron fertilizer yield is low; poor performance of copper fertilizer .1984 application of micro-fertilizer demonstration fields 260,000 mu of corn facilities Zinc increased 11.5%, millet increased 26%, 莜 wheat increased 16.8%; cotton increased 15.6% yield boron, millet increased 12.2%; beans increased 22% Mo yield, significant economic benefits.