摘要
为了解生物质炭施用对红壤性质的改良效果,采用盆栽试验研究不同生物质炭投入量对2种不同肥力水平红壤质量指标的影响,探讨生物质炭施用对黑麦草生长的影响.结果表明：红壤施用生物质炭不仅大大提高了土壤碳库,还可降低土壤酸度,增加土壤pH值和盐基饱和度,提高土壤水稳定性团聚体数量,增加土壤速效磷、速效钾和有效氮,增强土壤保肥能力,改善植物生长环境,促进黑麦草的生长;生物质炭施用量为10和50 g·kg-1时,经1年的培养试验后2个研究土壤的有机碳、速效P、速效K和盐基饱和度分别比对照增加31%~744%、14%~215%、6%~110%和17%~82%,pH值增加0.11~0.40个单位;生物质炭的改善作用在肥力水平较低的土壤上明显高于肥力水平较高的土壤,改善效果随生物质炭用量的增加而增加,而在肥力水平较高的土壤中,高量施用生物质炭（200 g·kg-1）可导致土壤微生物生物量下降,对黑麦草的生长产生轻微的抑制作用.
To understand the effects of biochar application on properties of red soil,a pot experiment was conducted to study the influences of different application rates of biochar on soil quality indexes of two red soils varying in their fertility levels.The effect of biochar application on ryegrass growth was also observed.The results showed that the application of biochar to the red soils not only increased greatly storage of organic carbon of the soils,but also increased pH value,base saturation,cation exchange capacity,and amounts of water-stable aggregates,field moisture capacity,available N,P and K of the soils,and decreased acidity and bulk density of the soils,and thus modified growth environments of ryegrass,and improved its growth.As compared to the control,concentrations of organic C,available P,K and base saturation of biochar-treated soils increased by 31%-744%,14%-215%,6%-110%,and 17%-82%,respectively,and soil pH increased by 0.11-0.40 unit,at the application of biochar of 10 and 50 g·kg-1.The effects of biochar application were related to fertility levels of the soils,and were greater in the low-fertility soil than in the high fertility soil.The modified effects in the low fertility soil increased with increasing the rates of biochar application.However,high application rate of biochar（200 g·kg-1） might result in decline of micro-biomass C in the high fertility soil,and limited slightly the growth of ryegrass.
出处
《浙江大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2011年第4期439-445,共7页
Journal of Zhejiang University:Agriculture and Life Sciences
基金
国家自然科学基金资助项目(4077109040471064)
关键词
生物质炭
红壤
养分
结构
生物量
biochar
red soil
nutrients
structure
biomass
