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稻蛙共作对水稻-紫云英轮作系统氨挥发的影响

本站小编 Free考研考试/2022-01-01

陈慧妍1,,
沙之敏1,
吴富钧1, 2,
方凯凯1,
徐春花3,
杨晓磊3,
朱元宏4,
曹林奎1,,
1.上海交通大学农业与生物学院 上海 200240
2.福建农林大学农学院 福州 350002
3.上海市农业技术推广服务 中心 上海 201103
4.上海青浦现代农业园区发展有限公司 上海 201717
基金项目: 上海市科技兴农推广项目(2019) No. 2-1
国家自然科学基金项目31770482

详细信息
作者简介:陈慧妍, 主要研究方向为稻田生态系统氮素循环。E-mail: huiyanchen@sjtu.edu.cn
通讯作者:曹林奎, 主要研究方向为生态农业与面源污染防控。E-mail: clk@sjtu.edu.cn
中图分类号:X171.3

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出版历程

收稿日期:2020-08-06
录用日期:2020-11-12
刊出日期:2021-05-01

Effect of rice-frog cultivation on ammonia volatilization in rice-Chinese milk vetch rotation system

CHEN Huiyan1,,
SHA Zhimin1,
WU Fujun1, 2,
FANG Kaikai1,
XU Chunhua3,
YANG Xiaolei3,
ZHU Yuanhong4,
CAO Linkui1,,
1. School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, China
2. College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
3. Shanghai Agricultural Technology Extension and Service Center, Shanghai 201103, China
4. Shanghai Qingpu Modern Agricultural Park Development Co., Ltd, Shanghai 201717, China
Funds: Shanghai Science and Technology Promotion Project(2019) No. 2-1
the National Natural Science Foundation of China31770482

More Information
Corresponding author:CAO Linkui, E-mail: clk@sjtu.edu.cn


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摘要
摘要:氨挥发是稻田氮素损失的主要途径之一,探究稻田生态种养模式对稻田土壤氨挥发产生的影响,可为该模式的生态环境效益评价提供理论依据。为评估稻蛙共作模式对水稻-紫云英轮作系统氨挥发的影响,通过开展田间小区试验,采用密闭式间歇抽气法采集氨气,对水稻-紫云英轮作系统的土壤氨挥发及其影响因素进行研究。试验共设置3个处理:空白对照(CK,不施肥,不放蛙)、常规水稻种植模式(CR,施化肥,不放蛙)、稻蛙共作模式(RF,施化肥,放蛙)。结果表明:稻蛙共作模式水稻季氨挥发累积量为47.02 kg·hm-2,占当季施氮量12.9%;其后茬紫云英季的氨挥发累积量为16.27 kg·hm-2;全年轮作系统的氨挥发累积量为63.29 kg·hm-2,较常规水稻种植模式的氨挥发累积量降低15.3%。稻蛙共作模式全年水稻-紫云英轮作系统的氨挥发累积量占施氮量的比例为17.4%,显著低于常规水稻种植模式所占比例(20.5%)。水稻田面水的铵态氮浓度是影响水稻季氨挥发的主要因素,水稻田面水pH、水温、气温、风速等因素的影响次之,随温度上升,水稻田面水铵态氮浓度对氨挥发速率的影响逐渐增大。放蛙对水稻产量、水稻产量构成因素、氮肥利用效率及后茬作物紫云英产量的影响不显著。综上所述,稻蛙共作模式在水稻-紫云英轮作系统中具备一定的氨减排潜力,但该模式对稻田氨挥发影响的长期效应及其影响机理仍需进一步研究。
关键词:水稻-紫云英轮作/
稻蛙共作/
氨挥发/
产量
Abstract:Ammonia (NH3) volatilization is one of the main mechanisms of nitrogen loss in paddy fields. Studying the impact of the ecological cultivation model in paddy fields on ammonia volatilization can provide a theoretical basis for its ecological and environmental benefits. To evaluate the effects of rice-frog cultivation on ammonia volatilization in a rice-Chinese milk vetch (CMV) rotation system, the continuous airflow enclosure method was used to collect ammonia in a field plot experiment to study soil ammonia volatilization and its related factors. The experiment included three treatments: control check (CK, no fertilization, no frogs), conventional rice cultivation (CR, fertilization, no frogs), and rice-frog cultivation (RF, fertilization, frogs released). The results showed that the cumulative amount of ammonia volatilization in the rice-frog cultivation treatment was 47.02 kg·hm-2, accounting for 12.9% of the nitrogen application rate in the current season. The subsequent cumulative amount of ammonia volatilization in the Chinese milk vetch season was 16.27 kg·hm-2. The cumulative ammonia volatilization in the annual rotation system was 63.29 kg·hm-2, which was 15.3% lower than that of conventional rice planting. The cumulative amount of ammonia volatilization produced by rice-frog cultivation in the annual rice-Chinese milk vetch rotation system accounted for 17.4% of the annual nitrogen application, which was significantly lower than that of conventional rice cultivation (20.5%). The ammonium nitrogen concentration in the floodwater was the main factor affecting ammonia volatilization in the rice season, followed by the pH and temperature of the floodwater, air temperature, and wind speed. As the temperature increased, the influence of the ammonium nitrogen concentration in the floodwater on ammonia volatilization increased. Frogs did not affect the rice yield, rice yield components, nitrogen fertilizer efficiency, or Chinese milk vetch yield. Therefore, rice-frog cultivation has the potential to reduce ammonia in the rice-Chinese milk vetch rotation system, but the long-term effects of this model on ammonia volatilization in paddy fields and its mechanisms require further study.
Key words:Rice-Chinese milk vetch (Astragalus sinicus) rotation/
Rice-frog cultivation/
Ammonia volatilization/
Yield

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图12019年试验区水稻生长气候条件
Figure1.Climate conditions of experimental site during the rice growing seasons in 2019


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图2水稻-紫云英轮作系统不同种植模式水稻季氨挥发速率变化
各处理的含义见表 1
Figure2.Changes of ammonia volatilization rates of different planting patterns in rice season of rice-Chinese milk vetch rotation system
The meaning of each treatment is shown in the table 1.


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图3不同种植模式水稻田面水${\rm{NH}}_4^ + {\rm{ - N}}$(a)、${\rm{NO}}_3^ - {\rm{ - N}}$(b)和pH (c)动态变化
各处理的含义见表 1
Figure3.Changes of${\rm{NH}}_4^ + {\rm{ - N}}$(a), ${\rm{NO}}_3^ - {\rm{ - N}}$(b) concentrations and pH (c) of floodwater of paddy field under different planting patterns in rice season
The meaning of each treatment is shown in the table 1.


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图4水稻田氨挥发速率与田面水${\rm{NH}}_4^ + {\rm{ - N}}$浓度(a)和pH(b)的相关性
**表示在P < 0.01水平显著相关。
Figure4.Dependence of ammonia volatilization rate on concentration of ${\rm{NH}}_4^ + {\rm{ - N}}$(a) and pH (b) of floodwater in paddy fields
** denotes significant correlation at P < 0.01 level.


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图5不同施肥时期水稻田氨挥发速率与田面水pH的Growth模型拟合
Figure5.Models to describe relation of ammonia volatilization rate and floodwater pH of paddy field in different fertilization periods


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表1水稻-紫云英轮作系统不同处理水稻季氮肥纯氮施用量
Table1.Nitrogen application rates of different treatments in rice season of rice-Chinese milk vetch rotation system?kg·hm?2
处理Treatment肥料Fertilizer基肥Basal fertilization第1次追肥Topdressing 1第2次追肥Topdressing 2总氮量Total N
不施肥, 不放蛙(CK)No fertilization and no frog
施化肥, 不放蛙(CR)Fertilization without frog复合肥Compound fertilizer15080300
尿素Urea70
施化肥, 放蛙(RF)Fertilization with frog复合肥Compound fertilizer15080300
尿素Urea70


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表2水稻-紫云英轮作系统不同种植模式氨挥发累积量
Table2.Accumulation of ammonia volatilization of different planting patterns of rice-Chinese milk vetch rotation system?kg·hm–2
处理Treatment水稻季Rice season紫云英季Chinese milk vetch season轮作系统Rotationsystem占施氮量的比例Percentage of applied nitrogen (%)
基肥Base fertilization第1次追肥Topdressing 1第2次追肥Topdressing 2总计Total水稻季Rice season轮作系统Rotation system
CK2.14±0.22b4.94±0.27b29.99±4.12a37.08±4.20b19.20±2.14a56.27±6.11b
CR11.04±2.11a8.95±1.84a35.72±0.84a55.72±2.02a19.05±1.41a74.76±2.60a15.29±0.55a20.52±0.71a
RF6.92±0.55a7.56±1.10a32.54±4.48a47.02±5.31ab16.27±0.97a63.29±4.70ab12.91±1.46a17.37±1.29b
各处理的含义见表 1。不同小写字母表示处理间在P < 0.05水平差异显著。The meaning of each treatment is shown in the table 1. Different lowercase letters indicate significant differences among treatments at P < 0.05 level.


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表3稻田氨挥发速率与各影响因素的逐步回归分析
Table3.Stepwise regression of ammonia volatilization and affecting factors in paddy fields
施肥阶段Fertilization stage因子Factor系数Coefficient常数Constant模型拟合度R2Goodness of fit显著性P Significance
基肥期Base fertilization${\rm{NH}}_4^ + {\rm{ - N}}$0.017?3.3980.639< 0.0001
pH0.482
第1次追肥Topdressing 1pH0.970?7.4150.607< 0.0001
${\rm{NH}}_4^ + {\rm{ - N}}$0.023
风速Wind speed0.215
第2次追肥Topdressing 2${\rm{NH}}_4^ + {\rm{ - N}}$0.0591.6650.734< 0.0001
风速Wind speed?0.265
降雨量Precipitation?0.025
日照Sunshine?0.068
总计Total${\rm{NH}}_4^ + {\rm{ - N}}$0.030?5.7220.563< 0.0001
风速Wind speed?0.229
pH0.675
水温Water temperature?0.069
气温Air temperature0.128


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表4不同种植模式水稻-紫云英轮作系统产量和氮肥利用效率
Table4.Yields and nitrogen fertilizer efficiencis of different planting patterns in rice season of rice-Chinese milk vetch rotation system
项目ItemCKCRRF
水稻籽粒产量Grain yield of rice (t?hm?2)5.73±0.37b8.33±0.35a8.32±0.32a
水稻秸秆产量Straw yield of rice (t?hm?2)9.70±0.06a12.59±1.07a11.72±1.50a
紫云英产量Chinese milk vetch production (t?hm?2)6.57±0.54a6.32±0.35a5.48±0.52a
水稻平均株高Average plant height of rice (cm)90.45±0.98b102.89±1.78a101.05±2.26a
水稻平均穗长Average panicle length of rice (cm)14.57±0.13a15.41±0.29a14.75±0.51a
水稻单位面积有效穗数Panicles per area of rice (×104?hm?2)276.00±13.86b400.67±16.67a444.44±6.41a
水稻每穗粒数Spikelets per panicle of rice (spikelets?panicle?1)106.57±5.34a99.23±6.06ab80.09±8.51b
水稻结实率Grain filling of rice (%)95.48±0.65a95.61±0.49a95.61±0.63a
水稻千粒重1000-grain weight of rice (g)25.40±0.29a24.76±0.40a24.43±0.33a
水稻收获指数Rice harvest index (%)37.09±1.60a39.96±1.26a41.90±2.20a
水稻氮素利用率Rice nitrogen use efficiency (%)40.99±5.39a35.25±5.28a
水稻氮肥农学利用率Rice nitrogen agronomic efficiency [kg?kg?1(N)]8.67±1.16a8.62±1.08a
水稻单位产量的氨挥发累积排放量Rice yield-scale cumulative emissions of ammonia volatilization (g?kg?1)6.51±0.81a6.72±1.48a5.63±0.52a
各处理的含义见表 1。同行不同小写字母表示处理间差异显著。The meaning of each treatment is shown in the table 1. Different lowercase letters in the same line mean significant differences at P < 0.05 level.


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