稻麦轮作体系中土壤肥力演变研究
毕业论文关键词：稻麦轮作；有机肥；土壤肥力
Study on the evolution of soil fertility in rice-wheat rotation system
Abstract：Rice-wheat rotation is an important mode of crop rotation in China. It is widely distributed and its production guarantees the food security of the country. Study on soil fertility evolution of rice-wheat rotation system is helpful for soil improvement and grain yield increase. The soil fertility experiments in the past rarely consider the effect of organic manure on Soil in rice-wheat cropping system, the experiment through the acquisition of soil in rice-wheat cropping systems under different fertilization treatments, the effects of organic and inorganic fertilizer on comprehensive investigation of soil fertility in rice-wheat cropping systems, the results are as follows: organic fertilizer (manure and straw). Inputs significantly improve soil nutrient content and biological traits, especially improve the available P, K content and carbon cycle related enzyme activity. The correlation analysis showed that both the total data set or minimum data set under the condition of organic fertilizer (manure and straw) inputs are conducive to the improvement of soil fertility, soil integrated fertility index and rice yield was positively correlated.
Key words: Rice-wheat rotation; Organic manure; Soil fertility
目录
目录 １
摘要 ２
关键词 ２
Abstract ２
Key words ２
引言 ２
1．材料与方法 ３
1.1试验地点和土壤采集 ３
1.2试验测定指标及方法 ４
1.3土壤质量评价 ４
1.3.1数据集 ４
1.3.2指标权重值 ４
1.3.3指标标准化 ４
1.3.4计算土壤质量指数 ５
2 . 结果与分析 ５
2-1土壤理化指标 ５
2-2土壤酶活性 ６
2-3土壤质量评价 ８
2-3-1评价数据集的建立 ８
2-3-2指标权重值计算 １０
2-3-3指标标准化 １１
2-4 土壤肥力与作物产量 １３
3 讨论 １４
致谢 １４
参考文献 １４
稻麦轮作体系中土壤肥力演变研究
引言 水稻和小麦作为全世界上最为重要的两种粮食作物，人类的日常膳食营养中能量总量的45%和蛋白质总量的30%都由其供应，同时也能作为畜禽牲畜的饲料使用。［1］稻麦轮作是水旱种植体系中的一种重要的种植模式，其种植区域广泛，全球种植总面积约有2600万 hm2，［2］同时也是我国重要的作物种植方式，水稻和小麦的产量对地区甚至全世界的粮食问题都有深远影响。稻麦轮作的种植方式在我国的水稻和小麦种植体系中是一种常见的水旱轮作模式，它具有不同于旱地和水田种植体系的独特的养分循环特性和田间管理方式。由于稻麦轮作体系中的水热条件的变化剧烈，轮作的土壤中养分理化性质及其变化、移动和累积都会与众不同，同时稻麦轮作体系下水稻、小麦生长条件的差异对土壤肥力演变带来很大影响，进而决定土壤养分资源的利用、流失及积累，形成了特殊的稻麦轮作体系土壤肥力情况及生态环境变化。
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