磷素对高硼土壤小麦生长的影响

Effects of phosphate on wheat growth in high-boron soil.

为减轻高硼(B)对小麦的毒害作用,研究了不同土壤B浓度下磷(P)素对小麦生长的影响。结果表明,增施P素能减轻小麦B毒害症状,小麦平均黄叶率由9.95％降至7.60％;促进小麦生长,B浓度为50mg/kg时,小麦根系和地上部分生物量分别增加44.9％和11.72％,30cm以下土层根系平均增加2.1％,促进了小麦对深层养分和水分的利用。

In order to search out a way to reducing the boron toxicity,effects of phosphate on wheat growth in boron toxicity soil have been studied. It is found that P can reduce the boron toxic symptom of wheat,percentage of yellow leaf decreases from 9. 95% to 7. 60%,and promote the growth of wheat roots and shoots by 44. 9% and 11. 72% respectively, when boron concentration reaches to 50mg/kg. Furthermore,deep roots below 30cm soil are increased by 2. 1% which promotes wheat to better use the water and nutrition in deep soil.