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1 2016-2017年水稻不同生育期土壤铵态氮和硝态氮含量变化

Table 1 Changes of soil ammonium N and nitrate N concentrations under treatments during different growing stages of rice in 2016 and 2017 (mg kg-1)

处理 Treatment NH4+-N NO3--N 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 19.24±2.26 11.53±4.03 12.71±1.11 6.51±0.70 2.07±0.12 3.76±0.57 4.72±0.32 1.52±0.24 CTS 21.88±2.56 14.61±2.13 16.04±0.79 8.71±0.31 1.82±0.11 4.95±0.23 5.94±0.30 2.09±0.19 NTNS 20.04±1.09 15.84±3.17 15.50±0.47 7.85±0.25 2.10±0.20 4.91±0.16 5.52±0.30 2.34±0.22 NTS 19.51±0.72 18.60±2.64 18.13±0.48 9.78±0.10 2.04±0.28 5.67±0.12 7.71±0.45 3.21±0.33 ANOVA T ns ** ** ** ns ** ** ** S ns ** ** * ns * ** ** T×S ns ns * ns ns ns ns ns 2017 CTNS 6.32±1.12 12.62±1.72 8.60±0.66 6.27±0.86 4.17±0.37 4.89±0.47 1.90±0.32 1.81±0.19 CTS 5.73±1.63 13.89±1.50 10.80±0.78 7.44±0.23 3.66±0.33 6.31±0.31 2.50±0.25 2.45±0.01 NTNS 7.21±1.21 15.81±1.55 10.01±0.47 7.87±0.39 3.59±0.44 5.91±0.67 2.20±0.30 1.99±0.10 NTS 6.21±0.51 17.56±2.46 13.14±0.71 9.45±0.83 2.90±0.35 7.83±0.33 2.93±0.22 2.95±0.18 ANOVA T ns * * ** ns ** ns * S ns ** ** ** ns ** ** * T×S ns ns ns ns ns ns ns ns