干旱区生态环境知识资源中心(Arid): Determination of optimal combination of applied water and nitrogen for potato yield using response surface methodology (RSM)

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DOI	10.21786/bbrc/19.1/8
	Determination of optimal combination of applied water and nitrogen for potato yield using response surface methodology (RSM)
	Soltani, Mohammad; Soltani, Jaber
通讯作者	Soltani, J
来源期刊	BIOSCIENCE BIOTECHNOLOGY RESEARCH COMMUNICATIONS
ISSN	0974-6455
出版年	2016
卷号	9 期号:1 页码:46-54
英文摘要	Irrigation water has become less available in many regions due to global climate change and an increased competition for water by industry, domestic purposes, and the environment. To confront this challenge, there is an urgent need to develop water-saving irrigation strategies and techniques in order to maximize crop water use efficiency (WUE). In the other hand over-fertilization of mobile nutrients like nitrogen (N) may lead to leaching beyond root zone under plentiful irrigation, while it may decrease yield under limited irrigation. Thus, fertilizer N needs to be optimized in relation to water availability. In order to determine optimum levels of water and nitrogen of potato, a field experiment was carried out by central composite design (CCD) as Response surface methodology (RSM) as a most popular optimization method, in Dehgolan plain in Kurdistan province, west of Iran, spring season of 2014. The treatments were designed based on low and high levels of water supply (50% and 100% of crop water requirement) and applied nitrogen (250 and 350 kg N ha(-1)) as independent variables. In this study, tuber yield (Y) and WUE were measured as response variables. Optimum levels of N fertilizer and irrigation depth were determined based on three scenarios: availability and nonavailability of water for irrigation. Furthermore, for environmental consideration, effects of minimum rate application of N on surface responses were evaluated also.. The results showed a marked interaction between level of irrigation and nitrogen on potato Y and WUE. The results also revealed that increasing irrigation and fertilizer led to an increase in tuber yield. WUE was decreased with increasing in water supply but N increasing had positive effect on WUE in a certain irrigation depth. Maximum Y was 69200 kg ha(-1), while application of 287 mm irrigation and 350 kg N ha(-1) was led to maximum WUE (159 kg ha(-1) mm(-1)). Based on response surfaces of Y and WUE, the amounts of 552 mm and 349.5 kg N ha(-1) was found to be the optimum levels of water and nitrogen for unlimited water conditions. WUE value in this situation was 130 kg ha(-1) mm(-1). For scarce water condition such as arid and semiarid regions, optimum values of irrigation water and N based on response surfaces were simulated 287 mm and 350 kg N ha(-1), respectively. If the goal of optimization is maximizing Y and WUE simultaneously, then applied water and nitrogen was estimated about 461 mm and 350 kg N ha(-1) and corresponding Y and WUE were achieved 62742 kg ha(-1) and 143 kg ha(-1) mm(-1) respectively. For minimizing N application, optimum levels of resources were found 502 mm irrigation and 250 kg N ha(-1). In this scenario 50242 kg ha(-1) for Y and 105 kg ha(-1) mm(-1) for WUE were obtained. Comparison of results showed that WUE maximizing strategy resulted in 48% saving in water supply. Simultaneous maximizing of Y and WUE reduced applied irrigation water by 17% and consequently tuber yield reduction rate was 9%. Potato yield reduction in minimum use of N was 27% while irrigation water applied decreased by 9%.
英文关键词	NITROGEN OPTIMIZATION POTATO RESPONSE SURFACE METHOD
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	ESCI
WOS记录号	WOS:000382861500008
WOS关键词	USE EFFICIENCY ; DIFFERENT IRRIGATION ; CROP ; PRODUCTIVITY ; PARAMETERS ; MANAGEMENT
WOS类目	Biotechnology & Applied Microbiology
WOS研究方向	Biotechnology & Applied Microbiology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/331603
作者单位	[Soltani, Mohammad; Soltani, Jaber] Univ Tehran, Dept Irrigat & Drainage Engn, Aburaihan Campus, Tehran, Iran
推荐引用方式 GB/T 7714	Soltani, Mohammad,Soltani, Jaber. Determination of optimal combination of applied water and nitrogen for potato yield using response surface methodology (RSM)[J],2016,9(1):46-54.
APA	Soltani, Mohammad,&Soltani, Jaber.(2016).Determination of optimal combination of applied water and nitrogen for potato yield using response surface methodology (RSM).BIOSCIENCE BIOTECHNOLOGY RESEARCH COMMUNICATIONS,9(1),46-54.
MLA	Soltani, Mohammad,et al."Determination of optimal combination of applied water and nitrogen for potato yield using response surface methodology (RSM)".BIOSCIENCE BIOTECHNOLOGY RESEARCH COMMUNICATIONS 9.1(2016):46-54.