毛竹林地表稻草覆盖后翻耕对土壤有机碳的影响

发布时间：2018-05-13 14:00

本文选题：毛竹 + 地表稻草覆盖　；参考：《生态学杂志》2017年08期

【摘要】：为了解毛竹林地表覆盖后翻耕对土壤总有机碳及土壤活性有机碳含量的影响,以浙江省台州市黄岩区山地毛竹林为研究对象,对连续覆盖2年翻耕,连续覆盖2年未翻耕和自然生长样地(对照)3种不同管理方式下地表覆盖的毛竹林0~50 cm土层土壤有机碳含量进行了比较。结果表明:覆盖2年未翻耕处理和覆盖2年翻耕处理0~50 cm各土层土壤总有机碳含量比对照样地分别增加了8.7%~43.8%和22.2%~90.8%;土壤轻组有机质含量较对照分别增加了13.2%~111.0%和36.7%~238.5%;覆盖2年翻耕处理和对照样地相比,0~50 cm各土层土壤易氧化碳含量分别增加了21.9%~97.5%,而覆盖2年未翻耕处理下的土壤易氧化碳含量0~20 cm土层较对照样地增加明显,20~50 cm土层则有减少的趋势;3种处理下的土壤水溶性有机碳含量,除10~20 cm土层差异性显著外,其余的土层变化都不明显;对照样地土壤水溶性有机碳占总有机碳的比率高于覆盖2年处理的毛竹林地,而易氧化碳占总有机碳的比率则表现为0~20 cm土层覆盖2年未翻耕覆盖2年翻耕对照样地,20~50 cm土层对照样地覆盖2年翻耕覆盖2年未翻耕;3种处理下土壤各活性有机碳与土壤总有机碳的相关性均达到极显著水平;3种处理方式下,土壤有机碳、水溶性有机碳、易氧化碳和轻组有机质与土壤养分(全氮、水解氮、有效磷、速效钾、交换性钙、交换性镁)的相关性均达到显著(P0.05)或极显著(P0.01)水平。
[Abstract]:In order to understand the effect of tillage on soil total organic carbon (TOC) and soil active organic carbon (AOC) of Phyllostachys pubescens forest after surface mulching, the bamboo forest in Huangyan area of Taizhou City, Zhejiang Province was used as the research object. The soil organic carbon contents in 0 ~ (50 cm) soil layer of bamboo forest covered by three different management methods were compared in two consecutive years without tillage and natural growth. The results showed that the total organic carbon content of soil in 0 ~ 50 cm soil layer increased by 8.73.8% and 22.2%, respectively, and the content of organic matter in light soil group increased by 13.21.0% and 36.7%, respectively, compared with that of the control, and the total organic carbon content of soil was increased by 8.738% and 22.2%, respectively, and the soil organic carbon content of light group was 13.21.0% and 36.7% higher than that of the control, respectively. The content of oxidized carbon in the soil layer of 0 ~ 50 cm was increased by 21. 9% and 97. 5%, respectively, and the soil layer of 0 ~ 20 cm soil layer covered with no tillage for 2 years was obviously increased by 20 ~ 50 cm soil layer than that of the same soil layer. The soil water-soluble organic carbon content of the three treatments decreased, Except for 10 ~ 20 cm soil layer, the change of other soil layers was not obvious, and the ratio of soil water-soluble organic carbon to total organic carbon in the same land was higher than that of bamboo forest land covered with 2 years treatment. However, the ratio of easily oxidized carbon to total organic carbon was 0 ~ 20 cm soil cover, 2 years no tillage cover, 2 years tillage cover, 20 ~ 50 cm soil layer, 2 years tillage cover, 2 years no tillage, 3 treatments. The correlation between mechanical carbon and soil total organic carbon reached very significant level under three treatments, The correlations of soil organic carbon, water-soluble organic carbon, easily oxidized carbon and light organic matter with soil nutrients (total nitrogen, hydrolyzed nitrogen, available phosphorus, available potassium, exchangeable calcium and exchangeable magnesium) were significant (P 0.05) or extremely significant (P 0.01).
【作者单位】：中国林业科学研究院亚热带林业研究所;台州市黄岩区林业技术推广总站;
【基金】：浙江省科技厅重大项目“毛竹林植被保护与生态复合经营技术研究与示范”(2015C32012);浙江省科技厅团队特派员项目“毛竹林高效培育技术示范于推广”(2012T2T120)和“生态经济复合型毛竹林培育技术示范与推广”(浙科发农[2013]215-95)资助
【分类号】：S714.2

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