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钼在植物生理中,参与固氮、氮的转化和磷的代谢。国内农业生产中应用较早,用于豆科作物较为广泛。本文仅就黄土地区主要耕作土壤中钼的含量与分布,作一简报。一、土壤中钼的水平分布钼的水平分布主要受成土因素影响,同时与人类从事农业生产有关。据测定,黄土区土壤全钼含量为0.39—1.10ppm,平均为0.57ppm,低于世界土壤(2.0ppm)和全国土壤(1.7ppm)的平均值。这是黄土中的矿物含钼很少的缘故。用pH3.3草酸—草酸铵浸提,催化极谱法测定,黄土区不同土壤中有效钼(表1)
Molybdenum is involved in nitrogen fixation, nitrogen conversion and phosphorus metabolism in plant physiology. The domestic application of agricultural production earlier, for a wider range of leguminous crops. This article only on the main cultivated soil in the loess area of molybdenum content and distribution, make a briefing. First, the level of distribution of molybdenum in the soil The horizontal distribution of molybdenum is mainly affected by the soil-forming factors, at the same time with the human beings engaged in agricultural production. According to the determination, the total molybdenum content in the loess area soil is 0.39-1.10ppm, with an average of 0.57ppm, lower than the average value of the world soil (2.0ppm) and the national soil (1.7ppm). This is because loess minerals contain very little molybdenum. With pH3.3 oxalic acid - ammonium oxalate extraction, catalytic polarography determination, available Lo in different loess soil (Table 1)