(土娄)土中硒含量和玉米、小麦、谷子生长的关系

The Relation Between Se Content in Lotu Soil and the Growth of Wheat Corn and Millet

向(土娄)土中加入不同量的硒,对玉米—小麦—小麦三年连茬及谷子三年连茬的盆栽试验结果表明:①土壤含硒量6ppm为影响玉米生长的临界值,22ppm为影响小麦及玉米种子产量的临界值。②土壤含硒量和玉米、小麦、谷子种子内的硒含量一般成正相关。③土壤含硒量相同时,种子对硒的累积量为小麦、谷子、玉米依次减小。

A pot experiment with different amount of selenium in Lotu for the rotation of maize-wheat wheat and millet-millet -millet respectively was carried out from 1986 to 1988. The results showed that : 1. The Se content of soil at 6 ppm was the critical level to effect the maize growth, 22 ppm was the critical level to effect the yields of wheat and maize. 2.The Se content in soil and in the seeds of wheat, maize and millet presented the significantly positive correlation. 3 . When Se concentration in soil was similar, the Se accumulation in the seeds of wheat , millet and maize was reduced in the proper order.