对江西省余江县28个典型田块的调查结果显示,余江县稻田土壤以粉砂壤土和壤土为主,土壤pH值在4.78～5.37之间,属酸性土壤。参照第二次全国土壤普查分级标准,余江县稻田土壤有机质、全氮、碱解氮和速效磷含量丰富,但速效钾含量处于中等水...对江西省余江县28个典型田块的调查结果显示,余江县稻田土壤以粉砂壤土和壤土为主,土壤pH值在4.78～5.37之间,属酸性土壤。参照第二次全国土壤普查分级标准,余江县稻田土壤有机质、全氮、碱解氮和速效磷含量丰富,但速效钾含量处于中等水平,少量田块还存在钾素缺乏的现象。2006～2008年28个定位田块平均年产量为12736 kg hm-2。主成分分析结果表明,影响当地水稻产量的主要土壤肥力因素是土壤有机质、全氮和碱解氮,速效钾的影响次之,再次是速效磷。因此,高度集约农业条件下土壤肥力指标值得进一步探讨;余江县在水稻生产过程中要加强有机肥的施用,增加钾肥施用,并适当减少磷肥的施用量。展开更多
To deal with the global and regional issues including food security, climate change, land degradation, biodiversity loss, water resource management, and ecosystem health, detailed accurate spatial soil information is ...To deal with the global and regional issues including food security, climate change, land degradation, biodiversity loss, water resource management, and ecosystem health, detailed accurate spatial soil information is urgently needed. This drives the worldwide development of digital soil mapping. In recent years, significant progresses have been made in different aspects of digital soil mapping. The main purpose of this paper is to provide a review for the major progresses of digital soil mapping in the last decade. First, we briefly described the rise of digital soil mapping and outlined important milestones and their influence, and main paradigms in digital soil mapping. Then, we reviewed the progresses in legacy soil data, environmental covariates, soil sampling, predictive models and the applications of digital soil mapping products. Finally, we summarized the main trends and future prospect as revealed by studies up to now. We concluded that although the digital soil mapping is now moving towards mature to meet various demands of soil information, challenges including new theories, methodologies and applications of digital soil mapping, especially for highly heterogeneous and human-affected environments, still exist and need to be addressed in the future.展开更多
文摘对江西省余江县28个典型田块的调查结果显示,余江县稻田土壤以粉砂壤土和壤土为主,土壤pH值在4.78～5.37之间,属酸性土壤。参照第二次全国土壤普查分级标准,余江县稻田土壤有机质、全氮、碱解氮和速效磷含量丰富,但速效钾含量处于中等水平,少量田块还存在钾素缺乏的现象。2006～2008年28个定位田块平均年产量为12736 kg hm-2。主成分分析结果表明,影响当地水稻产量的主要土壤肥力因素是土壤有机质、全氮和碱解氮,速效钾的影响次之,再次是速效磷。因此,高度集约农业条件下土壤肥力指标值得进一步探讨;余江县在水稻生产过程中要加强有机肥的施用,增加钾肥施用,并适当减少磷肥的施用量。
基金supported by the National Natural Science Foundation of China (91325301, 41571130051)
文摘To deal with the global and regional issues including food security, climate change, land degradation, biodiversity loss, water resource management, and ecosystem health, detailed accurate spatial soil information is urgently needed. This drives the worldwide development of digital soil mapping. In recent years, significant progresses have been made in different aspects of digital soil mapping. The main purpose of this paper is to provide a review for the major progresses of digital soil mapping in the last decade. First, we briefly described the rise of digital soil mapping and outlined important milestones and their influence, and main paradigms in digital soil mapping. Then, we reviewed the progresses in legacy soil data, environmental covariates, soil sampling, predictive models and the applications of digital soil mapping products. Finally, we summarized the main trends and future prospect as revealed by studies up to now. We concluded that although the digital soil mapping is now moving towards mature to meet various demands of soil information, challenges including new theories, methodologies and applications of digital soil mapping, especially for highly heterogeneous and human-affected environments, still exist and need to be addressed in the future.
