摘要
为明确不同保护性耕作技术对农田土壤理化性状及碳排放的影响,针对农田土壤有机质含量逐年减少,保水、保肥、蓄水保墒能力下降等问题,开展了保护性耕作技术研究。结果表明:保护性耕作可有效提高0~20cm土层自然含水量、田间持水量及孔隙度,根茬还田-TS处理土壤容重明显低于其它处理;增产效果显著,大豆增产率为2.45%~12.11%,玉米为1.53%~10.29%。0~20cm土层有机碳储量大大增加,尤其以秸秆覆盖免耕-TF处理最高,2013-2015年有机碳储量增加9 980~15 048kg·hm^(-2),留茬免耕-TL处理增加6 480~11 160kg·hm^(-2)。
In order to clarify the effects of different protective tillage techniques on soil chemical properties and carbon emission in farmland,the research on conservation tillage technology was carried out according to the serious situations of soil organic content in farmland reduced year by year,and the ability of soil water and fertilizer preserving decreased,etc.The result showed that conservative tillage could effectively increase the natural water content,field moisture capacity and the degree of soil porosity of 0~20 cm soil layer,.and the bulk density of TS treated soil was significantly lower than other treatments;increasing yield effect was significant,increasing yield of soybean 2.45% ~12.11%,maize 1.53% ~10.29%.Organic carbon storage of 0~20 cm soil layer increases greatly,especially in TF treatment.The organic carbon storage from 2013 to 2015 increases by 9 980~15 048 kg·hm^(-2),while an increase of 6 480~11 160 kg·hm^(-2) in TL treatment.
出处
《黑龙江农业科学》
2017年第12期36-40,共5页
Heilongjiang Agricultural Sciences
基金
水体污染控制与治理科技重大专项资助项目(2013ZX07201007)
"十二五"科技支撑计划资助项目(2013BAB03B02)
粮食丰产增效科技创新专项资助项目(2017YFD0300500)
关键词
保护性耕作
有机碳
土壤物理性状
conservation tillage
soil organic carbon
soil physical properties
