| 改良剂对旱地红壤活性有机碳及土壤酶活性的影响 |
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| 引用本文： | 袁颖红,张文锋,周际海,芮绍云,刘贵军,李丽,黄欠如,成艳红,孙 波.改良剂对旱地红壤活性有机碳及土壤酶活性的影响[J].土壤,2017,49(5):909-918. |
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| 作者姓名： | 袁颖红 张文锋 周际海 芮绍云 刘贵军 李丽 黄欠如 成艳红 孙 波 |
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| 作者单位： | 1. 江西省红壤研究所,江西进贤 331717;南昌工程学院江西省退化生态系统修复与流域生态水文重点实验室,南昌 330099;2. 南昌工程学院江西省退化生态系统修复与流域生态水文重点实验室,南昌,330099;3. 江西省红壤研究所,江西进贤,331717;4. 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京,210008 |
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| 基金项目： | 江西省教育厅科研技术研究项目(GJJ161100)、国家自然科学基金项目(41461050，41661065，31760167)和江西省2015年度研究生创新专项资金项目(YC2015-S416)资助。 |
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| 摘 要： | 针对江西旱地红壤肥力低下、生产力不高等突出问题,基于长期野外旱地红壤定位试验,研究了改良剂(生物质炭和过氧化钙)对旱地红壤活性有机碳及与碳代谢相关酶活性的影响。试验设置生物质炭施用量0(C0)、758(C1)、1 515(C2)kg/hm2和过氧化钙施用量0(Ca0)、61(Ca1)、121(Ca2)kg/hm2,生物质炭和过氧化钙单施和配施共9个处理,即CK、C0Ca1、C0Ca2、C1Ca0、C1Ca1、C1Ca2、C2Ca0、C2Ca1、C2Ca2。结果表明,生物质炭单施和配施均在一定程度上提高了旱地红壤有机碳及活性碳组分,且效果优于单施过氧化钙。C2Ca0、C2Ca1和C2Ca2处理土壤有机碳增加较显著。生物质炭和过氧化钙显著提高土壤活性有机碳组分,与对照(CK)相比,其中C1Ca0处理的微生物生物量碳平均增加了45.22%,C1Ca2处理的可溶性有机碳平均增加了21.34%,C1Ca0处理的颗粒有机碳平均增加了20.72%,C2Ca2处理的易氧化有机碳平均增加了22.19%。生物质炭和过氧化钙对提高碳库管理指数均有较好的效果,0~10 cm和10~20 cm土层分别平均增加了11.09%、14.07%。添加生物质炭对旱地红壤酶活性均有促进作用,且对0~10 cm土层土壤酶的影响较10~20 cm土层明显;配施C2Ca2明显提高旱地红壤淀粉酶、纤维素酶和β-葡糖苷酶活性,C1Ca1明显提高红壤蔗糖酶活性。因此,生物质炭和过氧化钙能有效改善旱地红壤活性有机碳组分以及与碳代谢相关酶活性,且生物质炭与过氧化钙配合施用对土壤改良的效果更好。
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| 关 键 词： | 改良剂 旱地红壤 活性有机碳 土壤酶 |
| 收稿时间： | 2016/9/12 0:00:00 |
| 修稿时间： | 2016/11/14 0:00:00 |
Effects of Amendments on Labile Organic Carbon and Soil Enzymes Activities in Upland Red Soil |
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| YUAN Yinghong,ZHANG Wenfeng,ZHOU Jihai,RUI Shaoyun,LIU Guijun,LI Li,HUANG Qianru,CHENG Yanhong and SUN Bo.Effects of Amendments on Labile Organic Carbon and Soil Enzymes Activities in Upland Red Soil[J].Soils,2017,49(5):909-918. |
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| Authors: | YUAN Yinghong ZHANG Wenfeng ZHOU Jihai RUI Shaoyun LIU Guijun LI Li HUANG Qianru CHENG Yanhong and SUN Bo |
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| Institution: | Jiangxi Institute of Red Soil,Jiangxi Institute of Red Soil,Jiangxi Key Laboratory for Restoration of Degraded Ecosystems & Watershed Ecohydrology, Nanchang Institute of Technology,Jiangxi Key Laboratory for Restoration of Degraded Ecosystems & Watershed Ecohydrology, Nanchang Institute of Technology,Jiangxi Key Laboratory for Restoration of Degraded Ecosystems & Watershed Ecohydrology, Nanchang Institute of Technology,Jiangxi Key Laboratory for Restoration of Degraded Ecosystems & Watershed Ecohydrology, Nanchang Institute of Technology,Jiangxi Institute of Red Soil,Jiangxi Institute of Red Soil and State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences |
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| Abstract: | A long-term field experiment was conducted to study the effects of different soil amendments (biochar and calcium peroxide) on soil labile organic carbon fractions and soil enzymes activities associated with carbon cycling in upland red soil in Jiangxi Province in order to resolve the problems of low fertility and productivity. 9 treatments were included in the experiment, i.e. CK, C0Ca1, C0Ca2, C1Ca0, C2Ca0, C1Ca1, C1Ca2, C2Ca1 and C2Ca2. The results showed that single application of biochar and combined application of biochar and calcium peroxide were beneficial to increase organic carbon content and labile organic carbon fractions, and the effects were better than single application of calcium peroxide. Soil organic carbon contents increased significantly under C2Ca0, C2Ca1 and C2Ca2 treatments. Biochar and calcium peroxide significantly increased soil labile organic carbon fractions. The content of microbial biomass carbon averagely increased by 45.22% in C1Ca0 treatment, the content of dissolved organic carbon averagely increased by 21.34% in C1Ca2 treatment, the content of particulate organic carbon averagely increased by 20.72% in C1Ca0 treatment, the content of labile organic carbon averagely increased by 22.19% in C2Ca2 treatment. Biochar and calcium peroxide increased averagely carbon management index by 11.09% and 14.07% in 0-10 cm and 10-20 cm soils, respectively. The enzyme activities were promoted with the addition of the biochar, and the effects of 0-10 cm soil layer was more obvious than 10-20 cm soil. The combined application (C2Ca2) significantly improved the activities of amylase, cellulase andβ-glucosidase, while the C1Ca1 treatment significantly improved invertase activity. Therefore, biochar and calcium peroxide can effectively improve labile organic carbon fractions and enzymes activities associated with carbon cycling in upland red soil, and their combined application is more helpful in soil improvement. |
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| Keywords: | Soil amendment Upland red soil Labile organic carbon Soil enzymes |
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