生物炭与有机肥、无机肥配施对采煤塌陷区复垦土壤理化性状的影响

发布时间：2019-01-05 17:02

【摘要】：为了研究施用生物炭对采煤塌陷复垦土壤的熟化效果,以山西省晋城市采煤塌陷复垦区土壤为研究对象,连续3年采用生物炭与有机肥、无机肥配施等方式研究其对复垦土壤主要理化性状的影响。结果表明:不同施肥处理均不同程度改善了土壤的理化性状,有机肥配施生物炭处理明显降低了复垦土壤容重(降幅10%),提高了土壤孔隙含水率(增幅7.14%),但对土壤pH影响不明显。有机肥处理和无机肥处理的土壤全氮、全磷含量差异不显著;无机肥配施生物炭处理与单施无机肥处理相比,速效磷增加了8.33%,速效钾增加了6.34%,增幅较明显,对碱解氮影响则不明显。有机肥配施生物炭,土壤细菌、真菌、放线菌数量增幅不明显;无机肥配施生物炭,真菌数量增幅最为明显(11.7%)。有机肥、无机肥配施生物炭处理玉米产量分别提高了3.03%和2.70%,生物炭的增产作用有限。因此,在复垦土壤上施用生物炭后可以提高有机肥和无机肥的培肥效果,单施生物炭效果不明显。
[Abstract]:In order to study the effect of biochar application on the soil maturation of coal mining collapse reclamation, the soil of mining collapse reclamation area in Jincheng city, Shanxi Province, was studied for 3 consecutive years with biochar and organic fertilizer. The effects of inorganic fertilizer application on the main physical and chemical properties of reclaimed soil were studied. The results showed that the physical and chemical properties of soil were improved by different fertilization treatments, and the soil bulk density (10%) and soil pore moisture content (7.14%) were obviously decreased by organic fertilizer combined with biochar treatment. But the effect on soil pH was not obvious. There was no significant difference in total nitrogen and phosphorus content between organic fertilizer treatment and inorganic fertilizer treatment. Compared with the treatment of inorganic fertilizer, the available phosphorus increased by 8.33, the available potassium increased by 6.34, the increase was more obvious, but the effect on the alkali-hydrolyzed nitrogen was not obvious. The increase of organic fertilizer combined with biochar, soil bacteria, fungi and actinomycetes was not obvious, while inorganic fertilizer combined with biochar had the most obvious increase (11.7%). The corn yield was increased by 3.03% and 2.70% by organic fertilizer and inorganic fertilizer combined with biochar, and the effect of bio-carbon on maize yield was limited. Therefore, applying biochar to reclaimed soil can improve the effect of organic fertilizer and inorganic fertilizer, but the effect of applying biochar alone is not obvious.
【作者单位】：山西农业大学资源环境学院;
【基金】：山西省土壤与养分重点实验室开放基金项目(2014003)
【分类号】：S147;S153

【相似文献】