期刊论文

Spatio-Temporal Variations of Soil Organic Matter in Paddy Soil and Its Driving Factors in China

Zhang, H.

中文

中国农业科学

0578-1752

2020

53

12

2410-2422

10.3864/j.issn.0578-1752.2020.12.009

2017YFD0800101:国家重点研发计划 2016YFD0300901:国家重点研发计划 4167130:国家自然科学基金 CARS-01-83:现代农业产业技术体系 1610132020022:中央级公益性科研院所基本科研业务费专项 161032019035:中央级公益性科研院所基本科研业务费专项 161032020021:中央级公益性科研院所基本科研业务费专项

本校为第一机构

【目的】评价中国稻田土壤有机质时空变化特征,为提高耕地质量,应对种植结构调整及气候变化等提供支撑。【方法】基于1988—2017年开展的338个国家级定位监测点,分析稻田耕层土壤有机质含量变化特征、驱动因素以及对土壤容重影响。【结果】近30年全国稻田耕层土壤有机质平均提高了3.49 g·kg~(-1),年均增速0.09 —0.12 g·kg~(-1)。稻田耕层土壤有机质含量年均增速高低依次为东北、长江下游、长江中游、华南和西南。目前,全国稻田耕层土壤有机质平均含量32.4 g·kg~(-1),从高到低依次为长江中游、华南、东北、西南和长江下游。气候、土壤类型、氮肥投入以及种植制度等对土壤有机质产生影响。西南...

【Objective】Spatio-temporal variation characteristics of soil organic matter (SOM) in paddy fields were evaluated in China, which would provide support for the improving the quality of cultivated land, adjustment of planting structure and climate change. 【Method】The characteristics of SOM change and its driving factors were analyzed based on 338 national long-term monitoring sites, which were carried out in different rice planting regions from 1988 to 2017. The effects of SOM on soil bulk density were also studied. 【Result】The SOM content ...