| 补灌对旱作集雨下麦田微生物呼吸与熵值的影响 |
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| 引用本文： | 徐悦悦,王楹鑫,马向成,蔡铁,贾志宽.补灌对旱作集雨下麦田微生物呼吸与熵值的影响[J].农业机械学报,2023,54(2):321-329. |
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| 作者姓名： | 徐悦悦 王楹鑫 马向成 蔡铁 贾志宽 |
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| 作者单位： | 山西农业大学;西北农林科技大学 |
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| 基金项目： | 国家自然科学基金项目（41671226）、山西农业大学博士科研启动项目（2021BQ46）、山西省博士来晋工作奖励资金科研项目（SXBYKY2021088）和省部共建有机旱作农业国家重点实验室自主研发项目（202105D121008） |
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| 摘 要： | 为探明沟垄集雨条件下限量补灌对麦田土壤质量的影响，在冬小麦生育期设置3种降雨年型(丰水年P1:275 mm、平水年P2:200 mm、干旱年P3:125 mm)和4个补灌量水平，以传统畦灌(Traditional flat planting, TF)为对照，对沟垄集雨补灌(Ridge-furrow mulching system, RF)条件下不同土层土壤微生物呼吸、土壤有机碳含量、微生物量碳含量及其熵值(土壤代谢熵和微生物熵)进行研究。连续3年的研究结果表明，与深层土壤相比，沟垄集雨补灌对表层土壤微生物呼吸强度和微生物熵影响更为显著。在冬小麦生育期降雨量和补灌量相同的情况下，沟垄集雨较传统畦灌表层和深层土壤微生物呼吸强度分别增加2.47%～21.67%和3.28%～24.59%,且均在干旱年(降雨量125 mm)达到显著性差异；而土壤有机碳含量分别降低0.42%～15.49%和3.34%～11.52%。微生物熵分别增加9.09%～27.05%和11.9%～24.76%;对同一降雨量下不同补灌处理进行显著性分析结果表明，与传统畦灌对比，沟垄集雨补灌对土壤代谢熵影响不显著。研究结果可为沟...
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| 关 键 词： | 农田节水 补充灌溉 土壤微生物呼吸 有机碳 土壤质量 |
| 收稿时间： | 2022/4/15 0:00:00 |
Response of Wheat Field Microbial Respiration and Its Entropy to Different Supplementary Irrigation under Ridge-furrow Mulching System |
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| XU Yueyue,WANG Yingxin,MA Xiangcheng,CAI Tie,JIA Zhikuan.Response of Wheat Field Microbial Respiration and Its Entropy to Different Supplementary Irrigation under Ridge-furrow Mulching System[J].Transactions of the Chinese Society of Agricultural Machinery,2023,54(2):321-329. |
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| Authors: | XU Yueyue WANG Yingxin MA Xiangcheng CAI Tie JIA Zhikuan |
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| Institution: | Shanxi Agricultural University;Northwest A&F University |
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| Abstract: | Soil microbial respiration and its entropy (soil metabolic entropy and microbial entropy) are important parameters indicating soil carbon metabolic activity and sensitivity indicators of soil quality, which can reveal the impact of environmental or biological factor changes on soil earlier. Ridge-furrow mulching system is an efficient water-saving cultivation mode widely used in dry farmland in China. In order to prove the influence of limited supplementary irrigation on soil quality under the condition of wheat field, three rainfall conditions (high flow year was 275mm, normal flow year was 200mm, and dry year was 125mm) and four irrigation treatments (150mm, 75mm, 37.5mm, and 0mm) under the ridge-furrow mulching system (RF) were set up during the growth period. Traditional flat planting (TF) was used as the control. The soil microbial respiration, microbial biomass carbon, and its entropy (soil metabolic entropy and microbial entropy) were determined in different soil layers under RF and TF. The results obtained after three years (October 2017 to June 2020) showed that RF had more significant effects on the soil microbial respiration and microbial entropy in the upper soil layer compared with those in the deep soil. Under the same amount of rainfall and supplementary irrigation during the growth period of winter wheat, soil microbial respiration levels under RF in the upper and deep soil layers were 2.47%~21.67% and 3.28%~24.59% higher compared with TF, respectively, and the difference was significant in the years with low flow year (125mm). The microbial entropy was increased by 9.09%~27.05% and 11.9%~24.76% in the upper and deep soil layers, respectively, under RF. These results provided a scientific basis for predicting the soil quality and planning irrigation management for fields under RF by clarifying its effects on the sustainable development of land. |
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| Keywords: | farmland water saving supplementary irrigation soil microbial respiration organic carbon soil quality |
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