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锰是植物不可缺少的微量养分。如果土壤缺锰,农作物会发生特殊的生理病害,造成减产和品质下降。本文介绍上海土壤中锰的含量分布和丰缺程度及锰肥效果。一、锰的含量分布上海土壤中锰的含量(全量)范围介于280～1076 ppm间,平均541ppm,低于我国土壤的平均含锰量(710ppm)。本地区土壤锰的含量分布较均匀。各类土壤的全锰含量,最大相差不超过三倍,其变异系数大多波动于15～20％之间。全锰含量的频率分布也颇为集中,在150多个测试样点中,全锰含量值分布在400～600ppm的样点数占48％,600～800ppm和800ppm以上的样点各占26％。土壤中锰的含量主要由成土母质和成土过程决定,以前者的影
Manganese is an essential trace nutrient for plants. If the soil is deficient in manganese, special physiological diseases will occur in crops, resulting in reduced yields and declining quality. This paper introduces the distribution of manganese in Shanghai soils and the degree of abundance and deficiency as well as the effect of manganese fertilizer. First, the distribution of manganese content in Shanghai soil manganese content (total) range between 280 ~ 1076 ppm, an average of 541ppm, lower than China’s average soil manganese content (710ppm). The manganese content of the soil in this region is more evenly distributed. All kinds of soil total manganese content, the largest difference of not more than three times the coefficient of variation mostly fluctuate between 15 to 20%. The frequency distribution of total manganese content is also quite concentrated. Among more than 150 test samples, the total manganese content is distributed in the range of 400-600ppm, accounting for 48%, and the samples containing 600-800ppm and 800ppm each account for 26% respectively. The content of manganese in the soil is mainly determined by the process of soil-forming parent material and soil formation, the shadow of the former