| 渭北旱塬土地整治新增耕地土壤养分特征及肥力等级评价——以合阳县为例 |
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| 引用本文： | 胡一,王晶,李刚.渭北旱塬土地整治新增耕地土壤养分特征及肥力等级评价——以合阳县为例[J].中国农学通报,2022,38(27):94-100. |
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| 作者姓名： | 胡一 王晶 李刚 |
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| 作者单位： | 陕西省土地工程建设集团有限责任公司；陕西地建土地工程技术研究院有限责任公司；自然资源部退化及未利用土地整治工程重点实验室；陕西省土地整治工程技术研究中心；自然资源部土地工程技术创新中心,西安 710021 |
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| 摘 要： | 以地处渭北旱塬东部的陕西省合阳县土地整治项目新增耕地为对象,研究县域内新增耕地土壤养分状况,为指导新增耕地后期管理提供参考。通过对合阳县12个乡镇新增耕地土壤有机质、全氮、有效磷、速效钾的变化特征进行分析,并采用物元模型对其进行综合评价。结果表明：合阳县新增耕地土壤养分含量普遍较低,有机质平均含量8.66 g/kg,全氮1.30 g/kg,有效磷18.66 mg/kg,速效钾151.21 mg/kg。土壤有机质含量偏低,全氮、有效磷含量适中,速效钾较丰富。养分评价等级显示Ⅳ级贫乏等级土壤占83.4%,肥力提升空间较大。建议结合当地经济水平和施肥习惯,优先考虑使用有机肥,适量增加化肥施用量。在种植方式上,可采用种植1年豆科作物和2年小麦的粮豆3年轮作种植模式。
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| 关 键 词： | 渭北旱塬 土地整治 新增耕地 土壤养分 等级评价 |
| 收稿时间： | 2021-09-09 |
Soil Nutrient Characteristics and Fertility Grade Evaluation of Newly-increased Farmland in Weibei Dryland: A Case Study of Heyang County |
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| HU Yi,WANG Jing,LI Gang.Soil Nutrient Characteristics and Fertility Grade Evaluation of Newly-increased Farmland in Weibei Dryland: A Case Study of Heyang County[J].Chinese Agricultural Science Bulletin,2022,38(27):94-100. |
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| Authors: | HU Yi WANG Jing LI Gang |
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| Institution: | Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Shaanxi Provincial Land Consolidation Engineering Technology Research Center, Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi’an 710021 |
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| Abstract: | To provide reference and guidance for follow-up management of newly-increased farmland, soil fertility status of newly-increased farmland following land consolidation project in Heyang County of Shaanxi Province, which was part of the eastern Weibei dryland, was studied. Development of soil organic matter, total nitrogen, available phosphorus and available potassium in newly-increased farmland from 12 towns in Heyang County were analyzed and then evaluated comprehensively using the matter-element model. The results show that the soil nutrient concentration is generally low in newly-increased farmland in Heyang County with an average organic matter content of 8.66 g/kg, total nitrogen of 1.30 g/kg, available phosphorus of 18.66 mg/kg, and available potassium of 151.21 mg/kg. The content of soil organic matter is relatively low, the contents of total nitrogen and available phosphorus are moderate, and available potassium is abundant. According to nutrient evaluation grades, soil classified as Grade IV with extremely low fertility accounts for 83.4% of all the newly-increased farmland and has huge room for soil fertility improvement. Taking local economic level and typical nutrient management practices into consideration, the priority should be given to organic fertilizers while application of chemical fertilizers should be increased at an appropriate rate. With respect to cropping systems, a 3-year grain-legume rotation with 1-year of soybean and 2-year of wheat is recommended. |
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| Keywords: | Weibei dryland land consolidation newly-increased farmland soil nutrient grade evaluation |
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