摘要
六个省市多年试验研究证明燃煤电厂湿排法排出的粉煤灰改良粘质土壤增产效果明显，亩施粉煤灰１．５万到３万公斤时，小麦增产１２．７±５．８％，玉米增产１２．１±３．５％，水稻增产１３．５±７．０％，此外对谷子、棉花、蔬菜均有一定的增产效果。试验表明：粘质土壤施入粉煤灰后，可以降低容重，增加孔隙度，调节三相比，提高地温，缩小膨胀率，明显的改善了粘土的物理性质，并能增磷、增硅，促进土壤中微生物活性，从而有利于土壤的保温、保墒，有利于养分的转化，为作物生长创造了良好的土壤环境。
A four-year field experiment was carried out
in six provinces and cities forstudying the effect of clayey soil amelioration with coal ash
produced by the wetmethod in power plants on crop yields. The results showed that by
applying 15000to 30000 kg/mu coal ash into soil, wheat yield increased by 12.7 ± 5.8%,crop
yieldby 12.1±3.5%,and the rice yield by 13.5±70%,with a certain effect on the yi-elds of
foxtail millet,sweet potato,cotton,and vegetables Besides, after applicationof coalash, clay
content of soil decreased,density and swelling value reduced, po-rosity of soil increased and
the ratio of 3 phases(gas,liquid,solid)was adjusted. Coal ash could also improve the physical
properties of clayey soil,increase soil P,and Si contents and promote microbial activities,thus
raising soil temperature,en-hancing the transformation of soil nutrients and creating a good soil
environmentfor crop growth.
出处
《土壤学报》
CAS
CSCD
北大核心
1995年第3期334-340,共7页
Acta Pedologica Sinica
基金
水电部重点项目
关键词
粉煤灰
粘质土壤
土壤改良
Coal ash,Clayey soil,Soil amelioration
