摘要
针对我国南方旱地红壤有效磷含量普遍较低的问题,研究了生物黑炭与无机肥料配施对旱地红壤有效磷、有机碳含量和pH的影响.结果表明:生物黑炭与无机肥料配施后,红壤理化性质得到不同程度的改善;土壤pH值、有机碳和有效磷含量在油菜各生育期均得到不同程度的提高,在抽薹期、开花期、成熟期分别较种植前平均提高了16%、24%、26%,23%、34%、38%及100%、191%、317%.pH、有机碳和有效磷含量随着生物黑炭用量的增多而增加.施用生物黑炭处理的土壤有效磷与pH和有机碳呈显著相关性.研究结果可为改善旱地红壤缺磷状况及其理化性质提供科学依据.
Aiming at the low content of available phosphorus in upland red soil of Southern China, this paper studied the effects of combined application of biochar and inorganic fertilizers on the available phosphorus and organic carbon contents and the pH of this soil. With the combined appli- cation of biochar and inorganic fertilizers, the soil physical and chemical properties improved to dif- ferent degrees. As compared with the control, the soil pH and the soil organic carbon and available phosphorus contents at different growth stages of oil rape after the combined application of biochar and inorganic fertilizers all had an improvement, with the increments at bolting stage, flowering stage, and ripening stage being 16%, 24% and 26% , 23% , 34% and 38% , and 100%, 191% and 317%, respectively. The soil pH and the soil organic carbon and available phosphorus contents were increased with the increasing amount of applied biochar. Under the application of biochar, the soil available phosphorus had a significant correlation with the soil pH and soil organic carbon con- tent. This study could provide scientific basis to improve the phosphorus deficiency and the physical and chemical properties of upland red soil.
出处
《应用生态学报》
CAS
CSCD
北大核心
2013年第4期989-994,共6页
Chinese Journal of Applied Ecology
基金
国家重点基础研究发展计划项目(2011CB100506)
土壤与农业可持续发展国家重点实验室项目(0812201208)资助
关键词
红壤
有效磷
生物黑炭
red soil
available phosphorus
biochar.
