Dynamic Changes of Soil Surface Organic Carbon under Different Mulching Practices in Citrus Orchards on Sloping Land.
Dynamic Changes of Soil Surface Organic Carbon under Different Mulching Practices in Citrus Orchards on Sloping Land.
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DOI：
10.1371/journal.pone.0168384
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Li Z
中科院分区：
文献类型：
--
作者：
Gu C;Liu Y;Mohamed I;Zhang R;Wang X;Nie X;Jiang M;Brooks M;Chen F;Li Z
覆盖管理已在世界各地的许多地方用于提高农业的可持续性。然而，碳循环的土壤覆盖下的应用程序在坡地耕地尚未完全了解。在丹江口水库小福岭流域进行了为期4年的田间试验。研究了秸秆覆盖和生草覆盖对土壤有机碳及其组分动态变化的影响。结果表明，地表覆盖增加了土壤有机碳及其活性组分的含量。与不覆盖对照（CK）相比，0-40 cm土层中，ST和GT处理的土壤有机碳（SOC）、可溶性有机碳（DOC）、溶解性有机碳（DOC）、颗粒有机碳（POC）和有效有机碳（EOC）含量分别增加了14.73%、16.5%、22.5%、41.5%和21%;各处理土壤有机碳及其活性组分含量均随土层深度的增加而降低。土壤有机碳在12月至次年3月期间累积。土壤DOC和DOC含量在1 ~ 3月较高，POC和EOC含量在6 ~ 9月较高。土壤有机碳组分的相对含量为POC > EOC > DOC> DOC。秸秆覆盖对不同时期土壤有机碳活性组分的变化无显著影响。通过对丹江口水库长期定位试验的研究发现，秸秆覆盖对坡耕地土壤有机碳含量和储量有显著的提高作用，其中生草覆盖效果优于稻草覆盖。我们讨论了可能的最佳时期实施覆盖措施的坡地。
Mulching management has been used in many places all over the world to improve agricultural sustainability. However, the cycling of carbon in the soil under applications of mulch on sloping arable land is not yet fully understood. A four-year field experiment was carried out in Xiaofuling watershed of Danjiangkou reservoir in China. The object was to evaluate the effects of the application of straw mulch (ST) and grass mulch (GT) on dynamic changes in soil organic carbon and its fractions. Results showed that mulch applied on the soil surface increased the contents of SOC and its active fractions in the soil. Compared to the control without cover (CK), ST and GT treatments increased the contents of SOC, LOC, DOC, POC and EOC by 14.73%, 16.5%, 22.5%, 41.5% and 21%, respectively, in the 0–40 cm soil layer, and by 17%, 14%, 19%, and 30%, respectively, in the 0–100 cm soil layer. The contents of organic carbon and its active fractions decreased with increasing soil depth in all of the treatments. SOC was accumulated in the period of December to the following March. The contents of soil DOC and LOC were high in January to March, while the contents of soil POC and EOC were high in June to September. The relative contents of soil organic carbon fractions were POC > EOC > LOC > DOC over the four years. Straw mulching had no significant effect on the changes in soil organic carbon active fractions during the different periods. Based on this long-term field experiment in Danjiangkou reservoir, we found that straw mulching had a significant effect on soil, increasing SOC content and stock in slopping arable land, and that live grass mulching was more effective than rice straw mulching. We discuss possible optimal periods for the implementation of mulching practices on sloping land.
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东北半干旱区不同树龄蒙古松人工林土壤物理组分有机碳
影响因子：
4.8
作者：
Chen, Fu-Sheng;Zeng, De-Hui;Liao, Peng-Fei
通讯作者：
Liao, Peng-Fei
DOI：
10.2136/sssaj1992.03615995005600030017x
发表时间：
1992-05-01
影响因子：
2.9
作者：
CAMBARDELLA, CA;ELLIOTT, ET
通讯作者：
ELLIOTT, ET
影响因子：
11.4
作者：
Adekalu, K. O.;Olorunfemi, I. A.;Osunbitan, J. A.
通讯作者：
Osunbitan, J. A.
DOI：
10.2136/sssaj1993.03615995005700020018x
发表时间：
1993-03-01
影响因子：
2.9
作者：
BEARE, MH;POHLAD, BR;COLEMAN, DC
通讯作者：
COLEMAN, DC
影响因子：
9.7
作者：
Bastian, Fabiola;Bouziri, Lamia;Ranjard, Lionel
通讯作者：
Ranjard, Lionel