【摘 要】
：
The dynamics of soil water content under different tillage systems was studied throughout the growing period of oat (Arena sativa L.).The treatments included ti
【机 构】
：
Center for Regional Agricultural Research & Development,College of Agronomy and Biotechnology,China
论文部分内容阅读
The dynamics of soil water content under different tillage systems was studied throughout the growing period of oat (Arena sativa L.).The treatments included tillage system (zero tillage,minimum tillage,and conventional tillage),residue cover (with and without cover),and crop rotation (continuous cropping and crop rotation).The results indicated that soil water content and crop water use efficiency were improved under zero tillage with cover.When crop stubble was removed,soil water content under zero tillage was reduced,especially in the surface soil layer.Compared to conventional tillage,minimum tillage increased soil water content and its storage,either with cover or without cover.For all the three tillage treatments,soil water content with cover was significantly higher than that of without cover.Furthermore,soil water content and crop water use efficiency under crop rotation was consistently higher than continuous cropping.Therefore,it is concluded that minimum tillage with cover is the optimum management system in this area.At present,however,a combination of crop rotation and minimum tillage is a viable option,since there are not enough crop residues available for cover of land.
其他文献
In a completely randomized block design experiment, 16 ruminally cannulated male sheep with body weights of (40 ± 2.1) kg were fed twice daily (8:00 and 16:00)
Yali is one of the best pear cultivars cultivated extensively in China and other countries.However,mortality rates of explants during the initial phase of tissu
9月12日下午,首都新闻学会召开“安岗同志从事新闻工作五十年经验交流会”,中宣部新闻局、人民日报、经济日报,光明日报、人大新闻系、新闻研究所、社会科学院新闻系等负责
A quadri-specific hybrid F1 (G.arboreum, G. herbaceum, G.hirsutum, and G.barbadense) was produced by crossing the doubled-chromosome (G.arboretum × G. herbaceu
Restriction fragment length polymorphism (RFLP) data was applied to analyze the distribution of the MyoD gene in 10 pig breeds and pig breed crosses.The populat
The effect of different modified tree shapes (MTS) on light reception was compared among three types of apple orchards: small-sized canopy, middle-sized canopy
随着国家经济与社会的快速发展，我国对高层次应用型人才的需求日益迫切，因而我国专业学位研究生培养的步伐也日益加快，专业学位研究生教育进入跨越式发展的时期，专业学位研究生的规模扩张较快，类型较为新颖，其专业涵盖了国民经济及社会发展的主要领域，有力地推动我国研究生教育从学术型人才培养模式向应用型人才培养模式的转变，弥补了以往重学术轻应用的研究生教育弊端。专业学位研究生教育的快速发展使我国逐渐从研究生教育
In order to study the effect of cell mediated immunity regulation of duck IFN-α eukaryon expression plasmid (pcDNA-SDIFN-α) on duck plague virus (DPV)attenuat
In order to screen and isolate microorganisms capable of degrading nicosulfuron,five strains of microorganisms coded as YF1,YB1,YB2,YB3,and YB4 that can take ni