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我国橡胶树叶片含锰量范围为31—2167ppm,平均390ppm,高于橡胶树正常植株叶片含锰量(150—300ppm)。因此,我国橡胶树目前锰素的营养状况是良好的。由于我国植胶区地区广,成土母质和土壤类型复杂,施肥管理水平不同,以及橡胶树在生长和产胶过程中锰素营养的不断消耗,土壤含锰量变幅很大。含锰最高值与最低值相差达140多倍,代换态锰、易还原态锰最高值与最低值相差高达200倍和1240倍。土壤中易还原态锰的贮备也显不足。因此,我国部分植胶区的橡胶树出现缺锰黄叶现象。本文提出了纠正缺锰黄叶症的施肥方法、施肥用量和施肥时期。
China’s rubber tree leaf manganese content range of 31-2167ppm, an average of 390ppm, higher than the rubber tree normal plant leaves manganese content (150-300ppm). Therefore, the current status of China’s rubber tree manganese nutrition is good. Due to the wide area of plastic planting areas in our country, the complex types of soil parent material and soil, the different levels of fertilization management and the continual consumption of manganese nutrients in the growth and production of rubber trees, the content of manganese in soils fluctuates greatly. The highest value of manganese and the lowest value difference of more than 140 times, substituting manganese, easy to reduce state manganese highest and lowest value of up to 200 times and 1240 times. The reserves of readily revertible manganese in soils are also insufficient. Therefore, part of rubber plantation rubber tree in our country appears manganese deficiency yellow leaves phenomenon. In this paper, we put forward the fertilization method, the amount of fertilizers and the fertilization period to correct the manganese-deficiency yellow leaf disease.