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| 芜湖市秸秆资源利用与还田养分输入量空间差异特征分析 |
| Utilization of straw resources and spatial difference characteristics of nutrient inputs from returning straw in Wuhu City |
| 投稿时间：2022-10-14 修订日期：2022-11-21 |
| DOI：10.13254/j.jare.2022.0724 |
| 中文关键词: 秸秆，芜湖市，秸秆还田，养分输入，空间分布，加权变异系数 |
| 英文关键词: straw, Wuhu City, straw returning, nutrient input, spatial distribution, weighted coefficient of variation |
| 基金项目:长江生态环境保护修复联合研究项目（2019-LHYJ-01-0208-15） |
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| 中文摘要: |
| 了解研究区域秸秆资源现状和秸秆还田养分输入量及其空间分布特征，能够为协调秸秆养分资源有效利用、促进农业化肥减量增效提供决策依据。本研究以芜湖市2019年主要秸秆（玉米、水稻、小麦、棉花和油菜）为研究对象，通过作物种植面积和秸秆养分含量测算出单位面积秸秆全量还田下氮、磷、钾养分输入量及其加权变异系数，明确芜湖市秸秆还田养分输入量的空间分布及差异特征。结果表明：芜湖市主要秸秆氮、磷、钾养分资源总量分别为12 223、1 747、23 404 t，各县（市、区）养分资源总量的分布表现为无为市>南陵县>鸠江区>湾沚区>繁昌区>弋江区>镜湖区；芜湖市单位种植面积秸秆可收集量为5.63 t·hm-2，其中玉米最高，达到了13.71 t·hm-2；芜湖市玉米单位种植面积秸秆还田氮、磷、钾输入量分别为126.16、20.57、161.81 kg·hm-2；芜湖市单位种植面积秸秆还田氮、磷、钾输入量的加权变异系数为0.137 5，为中等程度变异，其中鸠江区和南陵县与其他县（市、区）的空间差异较大，空间分布差异最大的秸秆为玉米秸秆，其加权变异系数显著高于其他作物秸秆。 |
| 英文摘要: |
| Under the current situation of comprehensive utilization of straw resources in Wuhu City, the nutrient inputs and their spatial distribution characteristics under straw returning can provide a decision-making basis for coordinating the effective utilization of straw nutrient resources and promoting the reduction and efficiency of agricultural chemical fertilizers. The main straws（maize, rice, wheat, cotton, and rape straw）in Wuhu City in 2019 were chosen as the research objects. According to the crop planting area and nutrient content of straw, the inputs of nitrogen, phosphorus, and potassium nutrients and their weighted coefficients of variation under straw returning per unit area, and the spatial difference characteristics and specific embodiment of nutrient inputs under straw returning in Wuhu City were determined. The results showed that the contents of N, P, and K were 12 223, 1 747 t, and 23 404 t, respectively, for the main straws in Wuhu City. Furthermore, the total amount of straw nutrient resources of counties were as follows：Wuwei>Nanling>Jiujiang>Wanzhi> Fanchang>Yijiang>Jinghu. The straw resources per unit planting area of crops in Wuhu City were 5.63 t·hm-2, of which maize reached the highest 13.71 t·hm-2. The inputs of N, P, and K of maize straw returning per unit planting area in Wuhu were 126.16, 20.57 kg·hm-2, and 161.81 kg·hm-2, respectively. The weighted coefficient of variation of the inputs of N, P, and K of straw returning per unit planting area of the main straws in Wuhu City were 0.137 5, which indicated moderate variation. The spatial difference was great in Jiujiang and Nanling. The spatial difference of maize straw was the largest, and its weighted coefficient of variation was significantly higher than that of other crop straws in Wuhu City. |
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