粉煤灰对土壤和作物生长的影响

粉煤灰施用量控制在60～600t／hm2，不会造成土壤、粮食的污染，且能改善土壤的物理、化学和生物学性质．有利于养分的转化。粉煤厂磁化后15～7．5t／hm2的施用量即可达到最佳的改上增产效果。本文在分析粉煤灰埋化性质的基础上，讨论了粉煤灰对土壤和作物生长的影响，同时也提出了降低粉煤灰中有害物质对土壤和作物不利影响的农用技术。

Effects of Fly Ash on Soil and the Growth of Crop

Fly ash does not cause soil and grain pollution when its application rate ranges from 60 to 600t/hm2.Results show that fly ash may improve the physical, chemical and biological properties of soil, promote the transformation of nutrients in soil, and creat a better soil environment for crop growth. After fly ash is magnetized, the best effect on soil amelioration and crop yield can be achieved by applying 1.5 to 7.5 t/hm2 fly ash into soil. The effects of fly ash on soil and crop growth are discussed based on its physical and chemical properties. The method of applying fly ash in agriculture and of reducing the adverse eftbcts of the toxic substances in fly ash on soil and crop is proposed.