干旱区生态环境知识资源中心(Arid): Spatial prediction of lime requirements by adjusting aluminium saturation in Sub-Saharan Africa croplands

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DOI	10.1016/j.scitotenv.2023.167989
	Spatial prediction of lime requirements by adjusting aluminium saturation in Sub-Saharan Africa croplands
	Uwiragiye, Yves; Ngaba, Mbezele Junior Yannick; Yang, Mingxia; Elrys, Ahmed S.; Chen, Zhujun; Cheng, Yi; Zhou, Jianbin
通讯作者	Uwiragiye, Y ; Zhou, JB
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2024
卷号	908
英文摘要	Acidic soils cover over 30 % of Sub-Saharan Africa cropland. Acidic soils deprive crops of calcium, magnesium, potassium, molybdenum, and phosphorus due to aluminium (Al), manganese, and iron toxicities. Thus, liming is required to adjust the level of exchangeable Al3+ to the desired level of Al saturation of the crops grown. Lime requirement (LR) was quantified using soil dataset from Africa soil information service (AfSIS). Spatial variations of LR of cereals, pulses and cash crops were predicted using random forest algorithm. Our results revealed that mean of LR Mg CaCO3 (1 Mg = 106 g) ha-1 for cereal crops were 6.34, 6.35, and 4.41 for maize, sorghum, and upland rice, respectively. Mean of LR (Mg ha-1) for pulses were 6.28, 5.19, and 4.90 for common beans, soybeans, and cowpeas, respectively. Mean of LR Mg CaCO3 (1 Mg = 106 g) ha-1 for cash crops were 3.41 and 6.29 for coffee and cotton, respectively. Spatial variation showed that LR in croplands was higher in tropical humid regions than in semi-arid and arid regions and ranged from 0 to 8.8 Mg ha-1. The results of 10-fold cross validation for high model performance of LR for tested crops were coefficient of determination (R2) of 0.61, a root mean square error (RMSE) of 0.5, and a mean absolute error (MAE) of 0.31, maize LR with RMSE = 0.9, MAE = 0.24, and R2 = 0.51, and cotton LR with RMSE = 0.5, MAE = 0.31, and R2 = 0.60. We recommend predicting lime requirement in acidic soils of Sub-Saharan Africa by adjusting Al saturation up to the tolerance of the grown crop, updating soil surveys in Sab Saharan Africa, and using digital soil mapping to monitor soil acidity and lime requirement.
英文关键词	Aluminium saturation Digital soil mapping Lime requirement
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001116610700001
WOS关键词	SOIL ACIDITY ; UPLAND RICE ; ACIDIFICATION ; PH ; MANAGEMENT ; MAGNESIUM ; CAPACITY ; NUTRIENT ; YIELD ; CORN
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405431
推荐引用方式 GB/T 7714	Uwiragiye, Yves,Ngaba, Mbezele Junior Yannick,Yang, Mingxia,et al. Spatial prediction of lime requirements by adjusting aluminium saturation in Sub-Saharan Africa croplands[J],2024,908.
APA	Uwiragiye, Yves.,Ngaba, Mbezele Junior Yannick.,Yang, Mingxia.,Elrys, Ahmed S..,Chen, Zhujun.,...&Zhou, Jianbin.(2024).Spatial prediction of lime requirements by adjusting aluminium saturation in Sub-Saharan Africa croplands.SCIENCE OF THE TOTAL ENVIRONMENT,908.
MLA	Uwiragiye, Yves,et al."Spatial prediction of lime requirements by adjusting aluminium saturation in Sub-Saharan Africa croplands".SCIENCE OF THE TOTAL ENVIRONMENT 908(2024).