| 暗管排水和有机肥施用下滨海设施土壤氮素行为特征 |
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| 引用本文： | 侯毛毛,陈竞楠,杨祁,林志远,金秋,钟凤林.暗管排水和有机肥施用下滨海设施土壤氮素行为特征[J].农业机械学报,2019,50(11):259-266. |
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| 作者姓名： | 侯毛毛 陈竞楠 杨祁 林志远 金秋 钟凤林 |
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| 作者单位： | 福建农林大学;现代设施农业福建省高校工程研究中心,福建农业职业技术学院,福建农业职业技术学院,福建农林大学,南京水利科学研究院,福建农林大学 |
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| 基金项目： | 福建省自然科学基金项目(2016J05069)、现代设施农业福建省高校工程研究中心开放基金项目（G2-KF1808）和中国博士后科研基金面上项目(2018M630723) |
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| 摘 要： | 为揭示暗管排水和微生物有机肥施用下滨海设施土壤氮素的归趋和转化机制，设计了暗管排水结合有机肥处理（S-OF）、暗管排水结合无机肥处理（S-IF）和无暗管排水的无机肥处理（CK），以葡萄和油菜间作栽培为模型系统，观测土壤总氮含量在垂直剖面上的分布、耕层土壤矿质态氮含量和有机态氮含量的变化及其与土壤理化性质的相关性。结果表明：暗管排水和微生物有机肥共同驱动下，土壤容重有所降低，孔隙度升高；暗管排水促使耕层土壤总氮向深层土壤迁移，相比S-IF，S-OF处理耕层土壤总氮的降低幅度较小；滨海设施土壤耕层的总氮80%以上以有机态形式存在，矿质态氮所占比例很小，S-OF处理有利于试验后期土壤矿质态氮含量的提升；耕层土壤矿质态氮含量与土壤有机质、总有机碳含量呈极显著正相关。暗管排水和微生物有机肥施用有利于改善滨海设施土壤结构，提高耕层土壤有机质和总有机碳含量，促进土壤有机态氮向矿质态氮的转化，本研究结果可为滨海设施土壤改良和水肥决策提供科学依据。
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| 关 键 词： | 设施土壤 氮素 暗管排水 微生物有机肥 归趋 |
| 收稿时间： | 2019/7/22 0:00:00 |
Behavior of Coastal Greenhouse Soil Nitrogen as Influenced by Subsurface Drainage and Organic Fertilizer |
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| HOU Maomao,CHEN Jingnan,YANG Qi,LIN Zhiyuan,JIN Qiu and ZHONG Fenglin.Behavior of Coastal Greenhouse Soil Nitrogen as Influenced by Subsurface Drainage and Organic Fertilizer[J].Transactions of the Chinese Society of Agricultural Machinery,2019,50(11):259-266. |
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| Authors: | HOU Maomao CHEN Jingnan YANG Qi LIN Zhiyuan JIN Qiu and ZHONG Fenglin |
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| Institution: | Fujian Agriculture and Forestry University;Engineering Research Center of Fujian University of Modern Facilities Agriculture,Fujian Vocational College of Agriculture,Fujian Vocational College of Agriculture,Fujian Agriculture and Forestry University,Institute of Water Conservancy Science of Nanjing and Fujian Agriculture and Forestry University |
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| Abstract: | Aiming to reveal the fate and transformation mechanism of soil nitrogen under coastal facilities cultivation, three treatments, including subsurface drainage combined with microbial organic fertilizer application (S-OF), subsurface drainage combined with inorganic fertilizer application (S-IF) and inorganic fertilizer application without subsurface drainage (CK) were designed. The model system was grape and rape intercropping cultivation. The distribution of soil total nitrogen in vertical profile, the changes of mineral and organic nitrogen in tillage layer and their correlation with soil physical and chemical properties were observed. The results showed that soil bulk density was decreased and soil porosity was increased under the combination of subsurface drainage and microbial organic fertilizer application;subsurface drainage promoted the transfer of total nitrogen from topsoil to deep soil, and the reduction rate of total nitrogen in topsoil of S-OF treatment was smaller than that of S-IF treatment;more than 80% of total nitrogen in topsoil existed in the organic form, and the proportion of mineral nitrogen was very small, S-OF was beneficial to the increase of mineral nitrogen content in the later stage of the experiment;the mineral nitrogen content in plough layer soil was positively correlated with soil organic matter and total organic carbon. Subsurface drainage and application of microbial organic fertilizer were conductive to improving the soil structure in coastal land, increasing the content of organic matter and total organic carbon in tillage soil, and promoting the transformation of soil organic nitrogen to mineral form. The conclusions can provide scientific basis for the improvement of coastal greenhouse soil and the decision-making of irrigation and fertilization. |
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| Keywords: | greenhouse soil nitrogen subsurface drainage microbial organic fertilizer fate |
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