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淮北平原砂姜黑土玉米产量与土壤性质的区域分析
熊鹏1, 郭自春1, 李玮2, 张中彬1, 王玥凯1, 周虎1, 曹承富2, 彭新华1
1.中国科学院南京土壤研究所;2.安徽省农业科学院作物研究所
摘要:
本研究以淮北平原蒙城县、怀远县和涡阳县作为调查区域,对砂姜黑土区48个样点的玉米产量及0-20 cm耕层土壤性质进行了分析。结果表明:在涡阳县东、西部、蒙城县南部和怀远县北部,玉米产量均在9 t/hm2以上,这些区域土壤容重较小;而在蒙城县北部,玉米产量大多在6.75 t/hm2以下,其土壤容重也最大,平均达到1.6 g/cm3以上。涡阳县土壤有机碳含量最高,平均值达到15.4 g/kg,较怀远县和蒙城县分别增加了28.8%和55.8%。土壤全量养分(全氮、全磷和全钾)随玉米产量等级变化不明显。相关性分析表明玉米产量与耕层土壤穿透阻力(r = -0.348, P < 0.05)、土壤容重(r = -0.484, P < 0.01)呈负相关,而与土壤有机碳(r = 0.421, P < 0.01)呈正相关。因此,本研究表明,土壤物理性质与土壤有机碳是影响该区玉米产量的关键限制因子。
关键词:  土壤物理性质  土壤容重  土壤穿透阻力  土壤有机碳
DOI:
分类号:S156.99
基金项目:国家重点研发计划项目课题(2016YFD0300809),国家自然科学(41930753, 41725004, 41771264),农业部行业专项课题(No. 201503116)共同资助。*通讯作者(xhpeng@issas.ac.cn)
Regional analysis of maize yield and soil properties in Shajiang Black Soil (Vertisol) in Huaibei Plain
XIONG Peng1, GUO Zichun1, LI Wei2, ZHANG Zhongbin1, WANG Yuekai1, ZHOU Hu1, CAO Chengfu2, PENG Xinhua1
1.Institute of Soil Science,Chinese Academy of Sciences;2.Crops Research Institute,Anhui Academy of Agricultural Sciences
Abstract:
In this study, taking Mengcheng County, Huaiyuan County and Guoyang County of Huaibei Plain as investigation areas, the maize yield and 0-20 cm topsoil properties of 48 sample sites in Shajiang black soil area were analyzed. The results show that in the east and west of Guoyang County, the south of Mengcheng County and the north of Huaiyuan County, the maize yield is more than 9 t/hm2, and the soil bulk density in these areas is small. In the north of Mengcheng County, the yield of maize is less than 6.75 t/hm2, and the soil bulk density is the highest, with an average of more than 1.6 g/cm3. The content of soil organic carbon in Guoyang County is the highest, with an average of 15.4 g/kg, which is 28.8% and 55.8% higher than that in Huaiyuan County and Mengcheng County, respectively. The total soil nutrients (total nitrogen, total phosphorus and total potassium) do not change significantly with the yield grade of maize. The correlation analysis shows that maize yield is negatively correlated with soil penetration resistance (r = -0.348, P < 0.05) and soil bulk density (r = -0.484, P < 0.01). It is positively correlated with soil organic carbon (r = 0.421, P < 0.01). Therefore, this study shows that soil physical properties and soil organic carbon are the key limiting factors affecting maize yield in this area.
Key words:  Soil physical properties  Soil bulk density  Soil penetration resistance  Soil organic carbon

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