Soil dissolved carbon and nitrogen dynamics along a revegetation chronosequence of Caragana korshinskii plantations in the Loess hilly region of China
Soil dissolved carbon and nitrogen dynamics along a revegetation chronosequence of Caragana korshinskii plantations in the Loess hilly region of China
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中国黄土丘陵区柠条人工林植被恢复时序土壤溶解碳氮动态
DOI：
10.1016/j.catena.2022.106405
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发表时间：
2022
期刊：
影响因子：
6.2
通讯作者：
Fusun Yang
中科院分区：
文献类型：
--
作者：
Changjiang Li;Changzhen Li;Luhong Zhao;Gaihe Yang;Xinhui Han;Chengjie Ren;Jian Deng;Fusun Yang
广泛的植被恢复是控制水土流失、改善土壤有机碳（SOC）和总氮（TN）储存的有效措施；然而，对土壤溶解碳和氮的了解还没有得到很好的表征。锦鸡儿人工林因其在黄土丘陵地区水土保持中的关键作用而受到重视。本研究旨在估算一个农田（Zea mays L.）和三个农田中的土壤碳和氮及其溶解部分的水平。 korshinskii 种植园 15 年、30 年和 40 年；此外，还估计了土壤碳和氮储量在不同土壤深度之间的分布。结果表明，造林用C． korshinski 导致 SOC 和 TN 及其溶解分数的含量和库存显着增加。在0-10厘米的深度，30岁的C. korshinskii 的 SOC 和 TN 储量最高，但在 40-100 和 100-200 cm 深度，15 年生土壤 SOC 和 TN 储量最高。科尔辛斯基。 15岁的C. korshinskii 在 0-200 厘米深度处具有最高的 SOC 和 TN 储量，并且在几乎所有土层中溶解氮储量最高。 100–200 cm 的土壤含有 SOC 和 TN 及其分数的累积储量总百分比的 34%–54%。 SOC库是影响土壤氮组分变化的最重要因素，占总变化的80%以上；此外，硝酸盐（NO3-N）含量和库存是影响土壤碳组分的最重要因素，占总变化的78%。这项研究表明，植被年龄和土壤深度在确定碳和氮水平方面发挥着重要作用。结果还表明C. korshinskii 种植园应在快速生长期（~15 年）收获并重新植被，在此期间，它们显示出最大的土壤碳和氮积累。
Widespread vegetation restoration is an effective measure used to control soil erosion and improve soil organic carbon (SOC) and total nitrogen (TN) storage; however, knowledge of soil dissolved carbon and nitrogen has not been well characterized.Caragana korshinskiiplantations are valued for their critical role in soil and water conservation in the Loess Hilly Region. This study aimed to estimate the levels of soil carbon and nitrogen and their dissolved fractions in one farmland (Zea mays L.) and threeC. korshinskiiplantations at 15, 30 and 40 years; additionally, the distribution of soil carbon and nitrogen stocks among various soil depths were estimated. The results showed that afforestation withC. korshinskiiresulted in a significant increase in the contents and stocks of SOC and TN and their dissolved fractions. At a depth of 0–10 cm, the 30-year-oldC. korshinskiihad the highest stocks of SOC and TN, but at depths of 40–100 and 100–200 cm, the highest SOC and TN stocks were found in the soil of 15-year-oldC. korshinskii. The 15-year-oldC. korshinskiihad the highest stocks of SOC and TN at depths of 0–200 cm and the highest stocks of dissolved nitrogen across almost all soil layers. The soil at 100–200 cm contained 34%–54% of the total percentages of the cumulative stocks of SOC and TN and their fractions. The SOC stock was the most important factor affecting the variation in soil nitrogen fractions and contributed to more than 80% of the total variation; additionally, the nitrate (NO3-N) content and stock were the most important factors affecting the soil carbon fractions, contributing to 78% of the total variation. This study demonstrates that revegetation age and soil depth play important roles in determining carbon and nitrogen levels. The results also suggest thatC. korshinskiiplantations should be harvested and revegetated during the rapid growth period (∼15 years) during which they show the largest accumulations of soil carbon and nitrogen.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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影响因子：
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作者：
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影响因子：
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作者：
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