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经三年盆栽和田间试验结果表明:磷锌配施调节了土壤中磷锌比例,增加了土壤中锌和磷的可给性,满足了大豆磷锌营养,提高了大豆共生固氮能力,叶面积增加,叶绿素含量提高,明显地茎叶运转,是诱发与加重作物缺锌的重要原因之一;大豆叶片含锌量≤20ppm,并p/zm值大于122.5时,促进了大豆生长发育;高磷抑制锌由根部向可出现缺锌症状;针对大豆叶片含锌量前期差异较大的特点,营养诊断在始花期进行为宜。
After three years of potted and field experiments showed that: phosphorus and zinc with the regulation of phosphorus and zinc in the soil ratio, increase the availability of zinc and phosphorus in the soil to meet the phosphorus and phosphorus nutrition of soybeans, increased symbiotic nitrogen fixation capacity, leaf area Increased chlorophyll content, and obviously stem and leaf operation were one of the important reasons for inducing and aggravating zinc deficiency in crops. When the zinc content of soybean leaves was less than or equal to 20ppm and the p / zm value was greater than 122.5, the growth and development of soybean were promoted. Inhibition of zinc from the roots to the emergence of zinc deficiency symptoms; zinc content of soybean leaves for the larger differences in the early diagnosis of nutrition at the beginning of flowering is appropriate.