期刊论文

Effects of Straw Return Methods on N_2O Emissions from Paddy Soils under Different Water Managements

中文

生态环境学报

1674-5906

2017

26

9

1501-1505

10.16258/j.cnki.1674-5906.2017.09.007

41401292:国家自然科学基金 41503081:国家自然科学基金 2015DFA90450:国家国际科技合作专项基金

本校为第一机构

稻田是重要的N_2O排放源,而稻田N_2O排放与土壤水分和施肥密切相关。南方丘陵区是中国水稻的重要生产地,然而由于地形海拔的差异,稻田的水分条件相差很大。该地域典型的稻田水分包括持续淹水、中期晒田(除中期晒田和收获前落干外,保持淹水)以及耕灌雨养(灌水整地插秧,水稻分蘖盛期后不灌溉,依靠自然降水)。稻草还田为土壤微生物提供了大量的碳、氮基质,不同的稻草还田方式(深施、表施)会影响微生物对稻草中的碳、氮的利用,从而可能会影响N_2O排放。采用静态箱-气象色谱法研究了南方丘陵区稻田土壤在不同水分条件(持续淹水、常规灌溉和耕灌雨养)下,秸秆还田方式(无稻草、稻草翻耕入土、稻草覆盖)...

Paddy is an important source of N_2O,the emissions of which from rice paddies are closely related to soil moisture and fertilizer application. Low hilly areas of southern China play an important role in rice production. However, water conditions in paddy systems vary greatly, due to their differences in topography and altitude. Typical water conditions in this area include continuous flooding (F,soil was continuously flooded), mid-season drainage (FDF,soil was flooded except drainage in mid-season and harvest time), and flooding - rainfed (FR, ...