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统一采集583个耕层土样,每个点代表面积2万亩,分析土壤有效锌、铜和锰含量。统计结果表明:土类间的有效养分含量平均值差异很大,同土类间的平均值差异更大。按有效锌含量0.5～1.0ppm、有效锰含量9.0ppm、有效铜含量0.2ppm为各自的临界值判断,本区土壤缺锌比较普遍,缺锰更为严重,仅有泥炭土和沼泽土可能缺铜。1980年以来进行锌肥试验得到证实,并建议今后要注意锰肥的试验和施用。
A total of 583 soil samples were collected, each of which represented an area of 20,000 mu. The available zinc, copper and manganese contents in the soil were analyzed. The statistical results show that there is a great difference between the average values of available nutrients in soil and the differences between the average values of soil nutrients. According to the critical value of effective zinc content of 0.5-1.0ppm, effective manganese content of 9.0ppm and effective copper content of 0.2ppm, the soil zinc deficiency in this area is relatively common, the manganese deficiency is more serious, and only peat soil and swamp soil may be lacking copper. Since 1980, zinc fertilizer test has been confirmed, and suggested that the future should pay attention to the test and application of manganese fertilizer.