摘要
为研究长期稻稻、稻稻油不同轮作条件下土壤结构、土壤养分与水稻产量的关系。本文对经30年稻稻油(DDY)与稻稻(DDF)轮作的土壤养分、土壤质地和水稻产量进行研究。结果表明:长期稻稻油轮作土壤pH值、有机质、全氮含量均低于稻稻轮作,土壤全钾含量高于稻稻轮作;长期稻稻油轮作土壤伊利石含量低于稻稻轮作,而高岭石含量高于稻稻轮作,表明长期稻稻油轮作能提高土壤风化程度,促进土壤养分元素的释放;Clay:SOC值能较好表征土壤结构状况,且与SOC呈较好线性关系,长期稻稻油轮作土壤Clay:SOC值均低于稻稻轮作;长期稻稻轮作水稻年均产量为14346 kg hm^(-2),长期稻稻油轮作水稻年均产量为15254 kg hm^(-2),年均增产6.3%。因此,长期稻稻油轮作能显著改良耕层土壤结构,促进土壤养分元素的释放及水稻的氮肥利用率,从而显著提高水稻籽粒产量。
The contents of soil nutrients, soil structure and rice yield were analyzed after 30 years rice-rice-rape and rice-rice-fallow rotations in order to investigate their relationships with long-term rotation. The results showed that the pH value and the contents of soil organic matter and total nitrogen under long-term rice-rice-rape rotation were lower than that under long-term rice-rice-fallow rotation; Soil had lower illite content and higher kaolinite content under long-term rice-rice-rape rotation than under long-term rice-rice-fallow rotation. So long-term rice-rice-rape rotation could increase the degree of soil weathering and promote the release of soil nutrient. The ratio of clay to soil organic carbon(SOC) could characterize the soil structure very well and had a good linear relationship with SOC. The ratio of clay to SOC under long-term rice-rice-rape rotation was lower than that under rice-rice-fallow crop rotation.Therefore, the long-term rice-rice-rape rotation can significantly improve soil structure at plow layer, increase the release and accumulation of soil nutrients, and then improve rice yield.
作者
卢胜
张振华
LU Sheng;ZHANG Zhen-hua(College of Resources and Environmental Sciences, Hunan Agricultural University/Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China/National Engineering Laboratory of Soil and Fertilizer Resources Efficient Utilization/Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, changsha 410128, China;Hunan Provincial Key Laboratory of Plant Nutrition in Common University, Changsha 410128, China)
出处
《土壤通报》
CAS
北大核心
2018年第2期409-414,共6页
Chinese Journal of Soil Science
基金
湖南省自然科学基金青年基金(2016JJ3069)
湖南省百人计划项目
湖南农大拔尖人才项目资助
关键词
稻稻油轮作
稻稻轮作
土壤结构
水稻产量
Rice-rice-rape rotation
Rice-rice-fallow rotation
Soil structure
Rice yield