新疆棉田小区域碳变化量研究
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摘要
为研究膜下滴灌条件下棉田小区域碳变化量,在棉花生长期内采用Li-8100A土壤碳通量自动测定仪和LCpro+光合仪连续观测不同样地土壤呼吸速率和净光合速率。结果表明:不同样地的土壤呼吸速率日变化均表现为单峰型曲线,峰值出现在16:00;而棉田净光合速率日变化则表现为单双峰曲线交替变化规律。两者月变化均呈现先升高后降低的趋势,7月土壤呼吸速率和净光合速率达到最大值。不同样地间土壤呼吸速率和净光合速率存在差异,土壤呼吸速率表现为垄间>垄上>裸地,净光合速率表现为垄间>垄上。棉田小区域在棉花整个生育期内均表现为碳汇,6—9月棉田净固碳总量为2 203.7 C g/m~2,光合作用固碳量为土壤呼吸排碳量的2.67倍。
In order to study the carbon variation in cotton field under drip irrigation, the soil respiration rate and net photosynthetic rate were observed continuously during the cotton growth period using Li-8100 A soil carbon flux automatic analyzer and LCpro+ photosynthetic apparatus. The results showed that the diurnal variation of soil respiration rates showed a unimodal curve with the peak at 16:00, while the diurnal variation of net photosynthetic rates in cotton field showed an alternating pattern of unimodal and bimodal curves. Both months showed a trend of increasing first and then decreasing, and the soil respiration rates and net photosynthetic rates reached the maximum in July. There were differences in soil respiration rates and net photosynthetic rates between different regions. The soil respiration rates were as follows inter-ridges > ridges > bare land, and the net photosynthetic rates was inter-ridges > ridges. The small area of cotton field showed carbon sinks throughout the growth period. From June to September, the total net carbon fixation in cotton fields was 2 203.7 C g/m~2, and the carbon sequestration by photosynthesis was 2.67 times that of soil respiration.
In order to study the carbon variation in cotton field under drip irrigation, the soil respiration rate and net photosynthetic rate were observed continuously during the cotton growth period using Li-8100 A soil carbon flux automatic analyzer and LCpro+ photosynthetic apparatus. The results showed that the diurnal variation of soil respiration rates showed a unimodal curve with the peak at 16:00, while the diurnal variation of net photosynthetic rates in cotton field showed an alternating pattern of unimodal and bimodal curves. Both months showed a trend of increasing first and then decreasing, and the soil respiration rates and net photosynthetic rates reached the maximum in July. There were differences in soil respiration rates and net photosynthetic rates between different regions. The soil respiration rates were as follows inter-ridges > ridges > bare land, and the net photosynthetic rates was inter-ridges > ridges. The small area of cotton field showed carbon sinks throughout the growth period. From June to September, the total net carbon fixation in cotton fields was 2 203.7 C g/m~2, and the carbon sequestration by photosynthesis was 2.67 times that of soil respiration.
引文
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[22] 陈全胜,李凌浩,韩兴国,等.水分对土壤呼吸的影响及机理[J].生态学报,2002,23(5):972-978.
[23] 陈亮,刘子亭,韩广轩,等.环境因子和生物因子对黄河三角洲滨海湿地土壤呼吸的影响[J].应用生态学报,2016,27(6):1795-1803.
[24] 匡经舸,李琬婷,程小毛,等.两种樱花植物的光合速率日变化及其与环境因子的相关性分析[J].北方园艺,2017(12):78-82.
[25] 厉书豪,李曼,张文东,等.CO2加富对盐胁迫下黄瓜幼苗叶片光合特性及活性氧代谢的影响[J].生态学报,2019,39(6):2-9.
[26] 李晨曦,何章,夏冬冬,等.农田人参叶片净光合速率日变化及其与环境因子的关系[J].西北农林科技大学学报(自然科学版),2017,45(9):199-205.
[27] 刘瑜,尹飞虎,曾胜和,等.大气CO2浓度升高对棉花叶绿素和光合指标的影响[J].新疆农业科学,2013,50(11):1991-1999.
[28] 刘芳婷,范文波,张金玺,等.膜下滴灌棉田土壤呼吸特征及其影响因素[J].排灌机械工程学报,2018,36(8):767-772.
[29] 王珊,党晓宏,高永,等.西鄂尔多斯高原5种荒漠灌丛土壤碳排放特征[J].干旱区研究,2018,35(4):796-803.
[2] 陈光水,杨玉盛,王小国,等.格氏栲天然林与人工林根系呼吸季节动态及影响因素[J].生态学报,2005,25(8):1941-1947.
[3] 刘允芬,欧阳化,张宪洲,等.青藏高原农田生态系统碳平衡[J].土壤学报,2002,39(5):636-642.
[4] Li K Q,Wang S Q,Cao M K.Vegetation in China and soil carbon content [J].Science in China,2003,33(1):77-80.
[5] Raich J W,Schlesinger W H.The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate [J].Tellus,1992,44:81-99.
[6] Schlesinger W H,Andrews J A.Soil respiration and the global carbon cycle [J].Biogeochemistry,2000,48:7-20.
[7] 严俊霞,李洪建,汤亿,等.小尺度范围内植被类型对土壤呼吸的影响[J].环境科学,2009,30(11):3121-3129.
[8] Kang S,Doh S,Lee D,et al.Topographic and climatic controls on soil respiration in six temperate mixed-hardwood forest slopes,Korea [J].Global Change Biology,2003,9(10):1427-1437.
[9] 郝兴宇,韩雪,李萍,等.大气CO2浓度升高对绿豆叶片光合作用及叶绿素荧光参数的影响[J].应用生态学报,2011,22(10):2776-2780.
[10] 杨志刚,崔世茂,胡栓红,等.长期CO2加富对温室辣椒结果期光合生理及产量的影响[J].西北农林科技大学学报(自然科学版),2018,46(12):1-8.
[11] Rochette P,Flanagan L B.Quantifying rhizosphere respiration in a corn crop under field conditions [J].Soil Science Society of America Journal,1997,61:466-474.
[12] 张前兵,杨玲,孙兵,等.干旱区灌溉及施肥措施下棉田土壤的呼吸特征[J].农业工程学报,2012,28(14):77-84.
[13] 贺美,王立刚,王迎春,等.长期定位施肥下黑土呼吸的变化特征及其影响因素[J].农业工程学报,2018,34(4):151-161.
[14] 郭丽,郑春莲,曹彩云,等.长期咸水灌溉对小麦光合特性与土壤盐分的影响[J].农业机械学报,2017,48(1):183-190.
[15] 朱延凯,王振华,李文昊.不同盐胁迫对滴灌棉花生理生长及产量的影响[J].水土保持学报,2018,32(2):298-305.
[16] 张前兵,杨玲,王进,等.干旱区不同灌溉方式及施肥措施对棉田土壤呼吸及各组分贡献的影响[J].中国农业科学,2012,45(12):2420-2430.
[17] 张宇,张海林,陈继康,等.耕作方式对冬小麦田土壤呼吸及各组分贡献的影响[J].中国农业科学,2009,42(9):3354-3360.
[18] 车宗玺,刘贤德,王顺利,等.祁连山放牧草原土壤呼吸及影响因子分析[J].水土保持学报,2008,22(5):172-175.
[19] 张晓龙,沈冰,权全,等.渭河平原农田冬小麦土壤呼吸及其影响因素[J].应用生态学报,2016,27(8):2551-2560.
[20] Fang C,Moncrieff J B.The dependence of soil CO2 efflux on temperature [J].Soil Biology and Biochemistry,2001,33(2):155-165.
[21] Liu X Z,Wan S Q,Su B,et al.Response of soil CO2 efflux to water manipulation in a tallgrass prairie ecosystem [J].Plant and Soil,2002,240(1/2):213-223.
[22] 陈全胜,李凌浩,韩兴国,等.水分对土壤呼吸的影响及机理[J].生态学报,2002,23(5):972-978.
[23] 陈亮,刘子亭,韩广轩,等.环境因子和生物因子对黄河三角洲滨海湿地土壤呼吸的影响[J].应用生态学报,2016,27(6):1795-1803.
[24] 匡经舸,李琬婷,程小毛,等.两种樱花植物的光合速率日变化及其与环境因子的相关性分析[J].北方园艺,2017(12):78-82.
[25] 厉书豪,李曼,张文东,等.CO2加富对盐胁迫下黄瓜幼苗叶片光合特性及活性氧代谢的影响[J].生态学报,2019,39(6):2-9.
[26] 李晨曦,何章,夏冬冬,等.农田人参叶片净光合速率日变化及其与环境因子的关系[J].西北农林科技大学学报(自然科学版),2017,45(9):199-205.
[27] 刘瑜,尹飞虎,曾胜和,等.大气CO2浓度升高对棉花叶绿素和光合指标的影响[J].新疆农业科学,2013,50(11):1991-1999.
[28] 刘芳婷,范文波,张金玺,等.膜下滴灌棉田土壤呼吸特征及其影响因素[J].排灌机械工程学报,2018,36(8):767-772.
[29] 王珊,党晓宏,高永,等.西鄂尔多斯高原5种荒漠灌丛土壤碳排放特征[J].干旱区研究,2018,35(4):796-803.