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近年来,随着农业生产的发展,氮磷化肥用量水平与七十年代前相比已成倍增加,而有机肥料却没有相应的增加,从而土壤中微量元素得不到补充,影响大豆生育,使产量下降和品质降低。为此,从1983～1985年在铁岭市农科所主持下,在全省8个市23个县(区)的不同土类和不同生产水平条件下,进行大豆作物施用锌、锰、硼肥试验研究。一、试验材料与方法全省试验网点统一试材:硫酸锌 ZnSO_4·7H_2O 含有效锌22.65%、硫酸锰 MnSO_4·H_2O含有效锰31.85%,硼砂 Na_2B_4O_7·10H_2O 含有效硼11.3%,三料过石含 P_2O_546%。
In recent years, with the development of agricultural production, the level of nitrogen and phosphorus fertilizer has doubled compared with that before the seventies, while the organic fertilizer has not been increased correspondingly, thus the trace elements in the soil can not be supplemented, affecting the growth of soybean, Decrease in production and quality. To this end, from 1983 to 1985 under the auspices of Tieling Agronomy, in the province’s eight cities in 23 counties (districts) of different soil types and different levels of production conditions, the application of soybean crop zinc, manganese, boron fertilizer Experimental Research. First, the test materials and methods The test sites of the province unified material: zinc sulfate zinc sulfate 22.65% containing zinc, manganese sulfate MnSO_4 · H_2O containing manganese 31.85%, borax Na_2B_4O_7 · 10H_2O containing boron effective 11.3% P_2O_546%.