论文部分内容阅读
取油菜叶片样和相应的表层土样各２３７个分析结果表明：土壤中锌、锰缺乏的频率分别为４８９％、６２５％，植物中硼缺乏的频率为８３５％。锌缺乏频率较高的土类为灰潮土、黄褐土、黄棕壤和紫色土。其中以黄褐土有效锌平均值最低，仅０７０ｍｇ／ｋｇ。土壤有效铜平均值高于临界值。油菜叶片中硼、氮较为缺乏，以灰潮土油菜叶片中有效硼最低，为７８ｍｇ／ｋｇ；氮低于５３ｇ／ｋｇ的样点占调查样点的４０％～１００％，叶片中其他元素含量均较丰富
237 rapeseed leaf samples and corresponding topsoil samples were analyzed. The results showed that the frequency of zinc and manganese deficiency in soil was 489% and 625%, respectively. The frequency of boron deficiency in plants was 835%. Zinc deficiency is higher in the soil as gray soil, yellow cinnamon soil, yellow brown soil and purple soil. Among them, the average effective zinc in yellow cinnamon soil is the lowest, only 070mg / kg. Soil average effective copper above the critical value. The content of boron and nitrogen in rapeseed leaves is relatively low, and the lowest available boron in rapeseed rape leaves is 78mg / kg. The sampling points with nitrogen below 53g / kg account for 40% ~ 100% Elemental content is more abundant