| 秸秆促腐还田对土壤养分及活性有机碳的影响 |
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| 引用本文： | 马 超,周 静,刘满强,郑学博,崔 键,李辉信,康炳龙.秸秆促腐还田对土壤养分及活性有机碳的影响[J].土壤学报,2013,50(5):915-921. |
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| 作者姓名： | 马 超 周 静 刘满强 郑学博 崔 键 李辉信 康炳龙 |
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| 作者单位： | 中国科学院南京土壤研究所;南京农业大学资源与环境科学学院,中国科学院南京土壤研究所,南京农业大学资源与环境科学学院,中国科学院南京土壤研究所,中国科学院南京土壤研究所,南京农业大学资源与环境科学学院,宋店乡农业综合服务站 |
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| 摘 要： | 通过2年的小麦-玉米轮作田间定位试验，设置5个处理：不施肥（CK）、单施化肥（F）、化肥 秸秆（FS）、化肥 秸秆 腐秆剂（FSD）、磷钾肥减施20%（按P2O5和K2O计，与F比较） 秸秆 腐秆剂（F4/5SD），通过分析作物收获后土壤耕层养分、活性有机碳和微生物生物量碳含量，计算土壤不同形态碳素有效率和碳库管理指数等，探讨秸秆促腐还田对沿淮砂姜黑土土壤养分和活性有机碳的影响。结果表明：1）与单施化肥处理相比，常规秸秆还田处理土壤碱解氮、有效磷和速效钾含量分别增加了13.0%、4.6%和10.7%，土壤活性有机碳有效率增加12.0%和11.1%，土壤碳库管理指数提高了30.6%；2）秸秆促腐还田处理土壤碱解氮、有效磷和速效钾含量分别增加了17.4%、40.5%和12.4%，土壤活性有机碳、活性有机碳有效率和可溶性有机碳分别增加了12.0%、9.5%和51.3%，土壤碳库管理指数提高了102.3%；3）土壤碳库管理指数与土壤养分含量、土壤碳素有效率等的相关性较土壤总有机碳含量有显著提高。可见，秸秆促腐还田较常规秸秆还田更利于提高沿淮砂姜黑土土壤养分含量、有机碳中活性组分含量及其有效率和土壤碳库管理指数；即使减施磷、钾肥20%，该措施的增肥和培土效果也不会明显下降。
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| 关 键 词： | 秸秆还田 腐秆剂 土壤养分 活性有机碳 碳库管理指数 砂姜黑土 |
| 收稿时间： | 5/4/2012 12:00:00 AM |
| 修稿时间： | 2013/3/15 0:00:00 |
Effects of incorportion of pre-treated straws into field on soil nutrients and labile organic carbon in Shajiang Black soil |
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| Ma Chao,Zhou Jing,Liu Manqiang,Zheng Xuebo,Cui Jian,Li Huixin and Kang Binglong.Effects of incorportion of pre-treated straws into field on soil nutrients and labile organic carbon in Shajiang Black soil[J].Acta Pedologica Sinica,2013,50(5):915-921. |
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| Authors: | Ma Chao Zhou Jing Liu Manqiang Zheng Xuebo Cui Jian Li Huixin and Kang Binglong |
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| Affiliation: | Institute of Soil Science, Chinese Academy of Sciences; College of Resources and Environmental Science, Nanjing Agriculture University,Institute of Soil Science,Chinese Academy of Sciences,College of Resources and Environmental Science, Nanjing Agriculture University,Institute of Soil Science,Chinese Academy of Sciences,Institute of Soil Science, Chinese Academy of Sciences,College of Resources and Environmental Science, Nanjing Agriculture University,Songdian agricultural comprehensive service station |
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| Abstract: | A two-year stationary field experiment under the crop rotation of wheat-corn was carried out in Shajiang black soil to study effects of incorporation of straws on soil nutrients and labile organic carbon. The experiment was designed to have five treatments, i.e. no fertilizer (CK), chemical fertilizer alone (F), chemical fertilizer straw (FS), chemical fertilizer straw organic matter-decomposing inoculant (FSD), and chemical fertilizer 20% less than Treatment F in terms of P2O5 and K2O straw organic matter-decomposing inoculant (F4/5SD). Soil samples were collected in the plough layer of the field after the crops were harvest, for analysis of contents of nutrients, labile organic carbon and microbial biomass carbon. Results show that the compared with Treatment F, Treatment FS increased alkalystic N, available P, available K, labile organic carbon , ALC and CMPI by 13.0%, 4.6%, 10.7%, 12.0%, 11.1% and 30.6%, respectively, and Treatment FSD did alkalystic N, available P, available K, labile organic C, soluble organic C, ALC and CMPI by 17.4%, 40.5%, 12.4%, 12.0%, 51.3%, 9.5%, 102.3%, respectively, when compared with F. Correlation analysis shows that CMPI was better related to total N, alkalystic N,, available P, available K, microbial biomass C and liable organic C in the soil than total organic C. Quite obvious, incorporating crop straws into the field with organic matter-decomposing inoculant is conducive to increasing soil nutrients, labile fraction of organic carbon, ALC and CMPI, that is to say, even if the application rate of P and K fertilizers is reduced by 20%, the soil-building effect of this practice will not decline significantly. |
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| Keywords: | Incorporating straw into field Organic matter-decomposing inoculant Soil nutrients Labile organic C CMPI Shajiang black soil |
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