稻田转为菜地初始阶段温室气体排放特征

邬磊,何志龙,汤水荣,吴限,张文菊,胡荣桂

Greenhouse Gas Emission During the Initial Years After Rice Paddy Conversion to Vegetable Cultivation

WU Lei,HE ZhiLong,TANG ShuiRong,WU Xian,ZHANG WenJu,HU RongGui

表2 试验前后稻田和菜地土壤的基本理化性质

Table 2 Soil organic carbon (SOC) and organic nitrogen (SON) contents, bulk density and pH of the 0-20 cm layer in double-rice and vegetable fields initially and 3 years later

土壤有机碳 SOC (g?kg-1) 土壤有机氮 SON (g?kg-1) 容重 Bulk density (g?cm-3) pH Dec 2012 Rice 18.7 ± 1.0a 2.04 ± 0.28a 1.03 ± 0.09b 5.48 ± 0.29a Veg 18.9 ± 1.2a 2.00 ± 0.36a 1.01 ± 0.07b 5.40 ± 0.18a Dec 2015 Rice 19.1 ± 0.6a 2.12 ± 0.62a 1.01 ± 0.02b 5.39 ± 0.37a Veg 17.2 ± 0.9b 1.74 ± 0.51b 1.39 ± 0.15a 4.34 ± 0.29b