生态环境学报2012，Vol.21Issue(2)：199-205,7.
保护性耕作对农田土壤有机碳库的影响
Effects of conversation tillage on soil organic carbon pool
摘要
Abstract
Farmland soil organic carbon, as an important component of terrestrial carbon pool, plays a crucial role in global carbon balance. It is influenced by climate, environmental factors and farming practices. This paper reviewed the effects of conservation tillage on it, and discussed the main routes of this influence through carbon input, decomposition and sequestration. According to literature records, under conservation tillage condition, crop root biomass in top soil increased 1.0%-142.9%, and soil microbial biomass increased 2.2%-140%. No-Tillage significantly reduced soil respiration rate from 0.9%-72.6%, thereby reduced the loss of carbon in soil. No-tillage also increased the amount and size of soil aggregates, to facilitate organic carbon sequestration in soil. The following aspects should be strengthened in the future research: (l)strengthening contrast research among with regional; (2) strengthening the long-term located research; (3) to strengthen the mechanism of carbon sequestration research; (4) establishing the model of multi-factor to strengthen the study on comprehensive effect.关键词
保护性耕作/碳输入/碳分解/碳固持Key words
conversation tillage/ carbon input/ carbon decomposition/ carbon sequestration分类
农业科技引用本文复制引用
张四海,曹志平,张国,胡婵娟..保护性耕作对农田土壤有机碳库的影响[J].生态环境学报,2012,21(2):199-205,7.基金项目
国家自然科学基金项目(30970536) （30970536）
