气候变化领域集成服务门户(CCPortal): Negative effects of water deficit on cocoa tree yield are partially mitigated by irrigation and potassium application

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DOI	10.1016/j.agwat.2024.108789
	Negative effects of water deficit on cocoa tree yield are partially mitigated by irrigation and potassium application
	Adet, Lucette; Rozendaal, Danae M. A.; Tapi, Arthur; Zuidema, Pieter A.; Vaast, Philippe; Anten, Niels P. R.
发表日期	2024
ISSN	0378-3774
EISSN	1873-2283
起始页码	296
卷号	296
英文摘要	Yields of most tropical crops are strongly reduced by drought, but this may be partially mitigated by irrigation and potassium application. Understanding the mechanisms regulating these relationships is essential to select crop varieties reaching high yield under environmental stress. We conducted a 2-year field experiment (2020-2022) to investigate the effects of seasonal irrigation, potassium application and their interaction on cocoa reproduction and yield, using six genotypes in Cote d'Ivoire. Potassium application increased pod number and size, contributing significantly to annual yield, but this effect was conditional to soil water availability. Similarly, irrigation when combined with potassium application almost doubled yield from 1.5 to 3.0 kg/tree (2000 kg ha-1 yr- 1 to 4000 kg ha-1 yr-1, respectively). This yield effect was mostly the result of positive effects of irrigation on pod number per tree and, to a lesser extent, due to its positive effects on bean number per pod and bean mass. Irrigation effects on pod number were associated with an increased number of cherelles whereas the larger pod number during the major harvest compared to the minor harvest was associated with lower cherelle wilt. We also found a more than two-fold genotypic difference in yield, with the genotypes CI02 and CI03 and to a lesser extent hybrid M having lower yields having lower yields than the genotype CI01. These genotypic yield differences were associated with differences in both cherelle wilt and initial cherelle production rates. The effects of withholding irrigation on yield were significantly dependent on the genotype, reflecting a potential genotypic difference in drought tolerance. The development of climate adaptive strategies for cocoa production requires integrating effects of irrigation, potassium application and cocoa genotype on yields. Future research should focus on unraveling the underlying genotypic and ecophysiological mechanisms of the results presented here, and identifying other potential approaches to enhance the resilience of cocoa to increasing water deficit under climate change.
英文关键词	Cocoa; Potassium application; Irrigation; Water deficit mitigation; Yield
语种	英语
WOS研究方向	Agriculture ; Water Resources
WOS类目	Agronomy ; Water Resources
WOS记录号	WOS:001219465600001
来源期刊	AGRICULTURAL WATER MANAGEMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304561
作者单位	Wageningen University & Research; Wageningen University & Research; Wageningen University & Research; Institut Agro; Montpellier SupAgro; CIRAD; Institut de Recherche pour le Developpement (IRD); Universite de Montpellier; CGIAR; World Agroforestry (ICRAF)
推荐引用方式 GB/T 7714	Adet, Lucette,Rozendaal, Danae M. A.,Tapi, Arthur,et al. Negative effects of water deficit on cocoa tree yield are partially mitigated by irrigation and potassium application[J],2024,296.
APA	Adet, Lucette,Rozendaal, Danae M. A.,Tapi, Arthur,Zuidema, Pieter A.,Vaast, Philippe,&Anten, Niels P. R..(2024).Negative effects of water deficit on cocoa tree yield are partially mitigated by irrigation and potassium application.AGRICULTURAL WATER MANAGEMENT,296.
MLA	Adet, Lucette,et al."Negative effects of water deficit on cocoa tree yield are partially mitigated by irrigation and potassium application".AGRICULTURAL WATER MANAGEMENT 296(2024).