Results 11 to 20 of about 1,108,021 (149)
Shuitu Baochi Xuebao, 2017 土壤水热状况是影响干旱区作物产量的主要因素，围绕膜下滴灌土壤水热运移情况，以河套灌区玉米为研究对象，开展了2年的田间试验，研究了膜下滴灌条件下不同覆膜耕作方式对土壤水热运移规律的影响。试验设垄作全膜（LQ）、垄作半膜（LB）、平作全膜（PQ）和平作半膜（PB） 4个处理，采用烘干法测定0—120 cm土壤含水量，ECH2O-5TE探头测定0—120 cm土壤温度。试验结果表明：在苗期，0—20 cm土层LQ土壤含水率较LB、PQ和PB分别提高了14.4%，23.8%和26.9%；拔节期，0—40 ...
齐智娟 +4 more
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Functional Ecology, Volume 37, Issue 7, Page 1948-1961, July 2023., 2023 Read the free Plain Language Summary for this article on the Journal blog. Abstract Orchid mycorrhiza forms unique symbiotic associations between members of the Orchidaceae and multiple ecological guilds of fungi. Because orchids associate with a wide variety of fungi with different ecological functions, they represent an ideal study system to address ...
Deyi Wang +8 more
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Methods in Ecology and Evolution, Volume 14, Issue 7, Page 1732-1746, July 2023., 2023 Abstract Our knowledge on the responses of permafrost ecosystems to climate warming is critical for assessing the direction and magnitude of permafrost carbon‐climate feedback. However, most of the previous experiments have only been able to warm the air and surface soil, with limited effects on the permafrost temperature.
Yuxuan Bai +8 more
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Methods in Ecology and Evolution, Volume 14, Issue 6, Page 1443-1456, June 2023., 2023 Abstract Successful use of stable isotopes (δ2H and δ18O) in ecohydrological studies relies on the accurate extraction of unfractionated water from different types of soil samples. Cryogenic vacuum distillation (CVD) is a common laboratory‐based technique used for soil water extraction; however, the reliability of this technique in reflecting soil ...
Bin Yang +14 more
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Factors that shape large‐scale gradients in clonality
Journal of Biogeography, Volume 50, Issue 5, Page 827-837, May 2023., 2023 Abstract Aim Many plant species reproduce clonally. However, ecologists still have much to learn about the factors that shape large‐scale patterns in plant clonal growth and reproduction, especially in the southern hemisphere. We addressed this knowledge gap by quantifying relationships between reproductive mode and a suite of plant characteristics and
Hongxiang Zhang +4 more
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Conservation Biology, Volume 36, Issue 2, April 2022., 2022 Abstract There is increasing interestin broad‐scale analysis, modeling, and prediction of the distribution and composition of plant species assemblages under climatic, environmental, and biotic change, particularly for conservation purposes. We devised a method to reliably predict the impact of climate change on large assemblages of plant communities ...
Alessandro Ferrarini +3 more
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Shuitu Baochi Xuebao, 2021 为明确秋耕对季节性冻融土壤热状况的调控作用，对比分析了翻耕（FG）、免耕（MG）、垄沟（LG）、翻耕活性炭覆盖（FH）和翻耕秸秆覆盖（FJ）5种处理对土壤温度、冻融循环以及土壤温度梯度等影响的差异。结果表明：与传统FG处理相比，MG、LG、FH、FJ处理均减弱了土壤温度与气温的相关性，降低了整个冻融期土壤温度的升、降温幅度和不同冻融阶段土壤温度昼夜变化的变异性程度，维持土壤温度序列稳定的能力FJ>FH>LG>MG。FG处理最先冻结和融化，其余处理延缓土壤冻结和融化速度的效果为FJ>FH>LG>MG ...
孙开, 王春霞, 蓝明菊, 梁飞
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温度对贵州喀斯特黄色石灰土有机碳矿化、水稻秸秆激发效应和Q10的影响
Shuitu Baochi Xuebao, 2022 为定量揭示温度和秸秆还田对贵州喀斯特黄色石灰土土壤有机碳矿化、激发效应和温度敏感性的影响。以贵州喀斯特地区典型黄色石灰土为研究对象,采用13C稳定性同位素标记的水稻秸秆和土壤培养试验研究了15,25,35 ℃培养温度下土壤原有有机碳矿化速率、累积矿化量、激发效应和温度系数Q10对水稻秸秆输入和温度的响应。结果表明:15~35 ℃温度范围和0~60天培养时间内,贵州喀斯特黄色石灰土土壤有机碳、总有机碳、水稻秸秆有机碳和土壤原有有机碳矿化速率均培养1天达到峰值,培养1~30天土壤总有机碳 ...
段建军 +6 more
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Shuitu Baochi Xuebao, 2020 为探究滴灌条件下水温与土温对覆砂土壤水热运移规律的影响，基于HYDRUS-2D构建了不同水土温度土壤水热运移数值模型，模拟分析了不同水土温度对覆砂土壤水分、温度动态变化的影响。结果表明：灌溉水温对土壤水热分布影响显著，随着温度升高，土壤湿润体内含水率减小，表现为35℃水温 < 20℃水温 < 5℃水温，灌溉水温对土壤剖面温度分布也有较大影响，表层0—15 cm范围内温度变化了5~10℃。相同水温条件下，随着土壤温度升高，土壤饱和导水率增大，湿润土体内体积含水率减小，表现为30℃土壤温度 < 15 ...
虎军宏 +3 more
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Shuitu Baochi Xuebao, 2022 土壤水热因子是影响作物生长发育的重要因子,尤其是在黄土高原自然植被恢复过程中。通过对黄土高原不同自然植被恢复阶段的土壤水分和温度的长期监测,研究植被恢复过程中土壤温度和水分的动态变化及其相关性。结果表明:8-10月草地群落的土壤温度显著高于其他群落,11月辽东栎林群落的土壤温度显著高于其他群落,随着植被恢复,土壤温度变化的范围和峰值均有不同程度的减小,土壤水分有所减少,但并不影响土壤水分随时间变化的总体趋势,不同植被恢复阶段土壤温度和水分呈显著负相关,植被恢复过程中土壤水分有一定的时间稳定性 ...
王俊 +4 more
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