耕作与秸秆还田方式对稻田N2O排放、水稻氮吸收及产量的影响

冯珺珩,黄金凤,刘天奇,曹凑贵,李成芳

Effects of tillage and straw returning methods on N2O emission from paddy fields, nitrogen uptake of rice plant and grain yield

Jun-Heng FENG,Jin-Feng HUANG,Tian-Qi LIU,Cou-Gui CAO,Cheng-Fang LI

表3 2016-2017年水稻不同生育期不同处理根系硝酸还原酶与谷氨酰胺合成酶活性的变化

Table 3 Changes in nitrate reductase and glutamine synthetase activities at different stages of rice growth under different treatments in 2016 and 2017

处理 Treatment 硝酸还原酶 Nitrate reductase (μg NO2- g-1 FW h-1) 谷氨酰胺合成酶Glutamine synthease (μmol g-1 FW h-1) 分蘖期 Tillering stage 拔节期 Boosting stage 齐穗期 Heading stage 成熟期 Mature stage 分蘖期 Tillering stage 拔节期 Boosting stage 齐穗期 Heading stage 成熟期 Mature stage 2016 CTNS 0.87±0.10 0.63±0.22 0.55±0.10 0.13±0.05 17.40±2.98 29.87±7.70 22.85±1.73 5.05±1.95 CTS 0.92±0.03 0.74±0.08 0.63±0.08 0.21±0.05 20.53±3.30 32.58±6.62 26.74±2.04 7.39±1.31 NTNS 0.70±0.13 0.55±0.09 0.55±0.04 0.08±0.06 19.83±2.11 30.69± 4.94 27.51±2.10 4.79±1.23 NTS 0.80±0.13 0.78±0.07 0.60±0.07 0.14±0.10 21.85±3.13 33.46±6.77 29.30±2.48 7.05±0.87 ANOVA T * ns ns ns * ns ns ns S ** ** * ** * * ns ** T×S ns ns ns ns ns ns ns ns 2017 CTNS 0.98±0.08 0.62±0.04 0.31±0.01 0.15±0.03 26.78±8.68 26.61±5.02 26.76±4.07 10.66±0.74 CTS 0.94±0.06 0.80±0.07 0.56±0.11 0.17±0.02 25.56±8.81 38.36±6.66 30.26±2.29 12.66±2.15 NTNS 0.84±0.17 0.53±0.03 0.43±0.10 0.05±0.03 29.86±10.5 29.43±1.43 20.53±4.62 8.78±0.95 NTS 0.76±0.12 0.75±0.12 0.52±0.09 0.08±0.04 27.64±7.26 41.97±8.78 29.40±5.15 9.35±1.46 ANOVA T ns ns ns * ns ns ns ns S ns ** ** * ns * * * T×S ns ns ns ns ns ns ns ns