干旱区生态环境知识资源中心(Arid): 水氮运筹对糜子生育后期干物质积累、转运及水氮利用效率的影响

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	水氮运筹对糜子生育后期干物质积累、转运及水氮利用效率的影响
其他题名	Effects of Water and Nitrogen Management on Dry Matter Accumulation, Transportation,and Water and Nitrogen Use Efficiency of Broomcorn Millet in the Late Growth Stage
	刘鹏; 杨刚; 常闻谦; 程炳文; 赵世伟
来源期刊	水土保持研究
ISSN	1005-3409
出版年	2019
卷号	26 期号:4 页码:139-145
中文摘要	为明确干旱、半干旱地区糜子水肥关系,并为水肥资源高效利用提供技术依据,以固糜21号为材料,在盆栽试验条件下,采用完全随机组合设计,水分设置50%,70%,90%田间持水量,施氮量设置0,0.05,0.10gN/kg干土(折合纯氮0,75,150kg/hm~2),研究不同水氮处理对糜子生育后期总叶面积、净光合速率、干物质积累与转运、水分利用效率及氮素利用效率的影响。结果表明:适宜水氮条件可以延缓叶片的衰老速度,维持较高的总叶面积,显著提高糜子灌浆期的净光合速率,促进灌浆后干物质的积累及转运,增加产量;糜子水分利用效率随施氮量的增加而增加,随土壤水分水平的提高而降低,追施氮量超过75kg/hm~2后有减小趋势;糜子氮肥农学利用效率、氮肥生理利用效率、氮肥偏生产力随土壤含水量的提高而提高,随施氮量的增加而降低。拔节期70%田间持水量和追施氮75kg/hm~2耦合主要通过延缓叶片衰老速度,增强灌浆期功能叶光合输出能力,增加灌浆后干物质的积累量,促进干物质的转运,提高水分利用效率以及氮素利用效率,从而对糜子产量产生调控作用。试验条件下,W2N2(70%田间持水量、追氮75 kg/hm~2)为最优水氮组合。
英文摘要	To provide high-yield and efficient utilization of water and fertilizer resources in the arid and semiarid areas of China,broomcorn millet,Gumi 21,was adopted as test crop.Under the conditions of pot experiment,a completely random combination design was adopted,and the water contents were set as 50%, 70%,and 90%of the field water holding capacity.Nitrogen use rates such as 0,0.05,0.10 g N/kg dry soil (converted to pure nitrogen 0,75,150 kg/hm~2)were set.The total leaf area,net photosynthetic rate,dry matter accumulation and transport,water use efficiency and nitrogen use efficiency of different water and nitrogen treatments in the late growth stage of broomcorn millet were examined.The results showed that suitable water and nitrogen conditions could delay the senescence rate of leaves,maintain a high total leaf area,significantly increase the net photosynthetic rate of the broomcorn millet during the grain filling stage, promote the accumulation and transport of dry matter after the grain filling stage,and increase the yield;the water use efficiency of broomcorn millet increased with the increase of nitrogen application rate,and decreased with the increase of soil water level.After the application of nitrogen more than 75 kg/hm~2,water use efficiency of broomcorn millet presented the decreasing trend.The agronomic utilization efficiency,nitrogen fertilizer physiological utilization efficiency and nitrogen fertilizer partial productivity of broomcorn millet increased with the increase of soil water content,and decreased with the increase of nitrogen application rate. The 70%of field water holding capacity and nitrogen application rate of 75 kg/hm~2 can regulate the production of broomcorn millet mainly by delaying the senescence rate of leaves,enhancing the photosynthetic output capacity of functional leaves during the filling stage,increasing the accumulation of dry matter after the filling stage,promoting the transport of dry matter,improving water use efficiency and nitrogen utilization efficiency.Under the experimental conditions,70%field water holding capacity and topdressing nitrogen rate of 75 kg/hm~2 is the optimal water and nitrogen combination.
中文关键词	糜子 ; 净光合速率 ; 干物质 ; 产量 ; 水氮利用效率
英文关键词	broomcorn millet net photosynthetic rate dry matter yield water and nitrogen use efficiency
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6583255
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378985
作者单位	刘鹏, 西北农林科技大学资源环境学院, 杨凌, 陕西 712100, 中国.; 杨刚, 西北农林科技大学资源环境学院, 杨凌, 陕西 712100, 中国.; 常闻谦, 西北农林科技大学资源环境学院, 杨凌, 陕西 712100, 中国.; 程炳文, 宁夏农林科学院固原分院, 固原, 宁夏 756000, 中国.; 赵世伟, 西北农林科技大学资源环境学院;;中国科学院水利部水土保持研究所, ;;, 杨凌;;杨凌, 陕西;;陕西 712100;;712100, 中国.
推荐引用方式 GB/T 7714	刘鹏,杨刚,常闻谦,等. 水氮运筹对糜子生育后期干物质积累、转运及水氮利用效率的影响[J],2019,26(4):139-145.
APA	刘鹏,杨刚,常闻谦,程炳文,&赵世伟.(2019).水氮运筹对糜子生育后期干物质积累、转运及水氮利用效率的影响.水土保持研究,26(4),139-145.
MLA	刘鹏,et al."水氮运筹对糜子生育后期干物质积累、转运及水氮利用效率的影响".水土保持研究 26.4(2019):139-145.