Response of Sweetpotato [Ipomoea batatas (L.) Lam.] to Five Rates Each of Nitrogen and Phosphorus under Guinea and Sudan Savannah Agroecological Zones of Ghana  

作　　者：Issah Alidu Abukari Iddrisu Yahaya Kwabena Acheremu Joseph Adjebeng-Danquah Issah Sugri Julius Yirzagla George Yakubu Mahama Abdul-Latif Abdul-Aziz Edward E. Carey Putri Ernawati Abidin Mutari Abubakari Ahmed Seidu Issah Alidu Abukari;Iddrisu Yahaya;Kwabena Acheremu;Joseph Adjebeng-Danquah;Issah Sugri;Julius Yirzagla;George Yakubu Mahama;Abdul-Latif Abdul-Aziz;Edward E. Carey;Putri Ernawati Abidin;Mutari Abubakari;Ahmed Seidu(CSIR-Savanna Agricultural Research Institute, Tamale, Ghana;Reputed Agric4Dev Stichting and Foundation, Kumasi, Ghana)

机构地区：[1]CSIR-Savanna Agricultural Research Institute, Tamale, Ghana [2]Reputed Agric4Dev Stichting and Foundation, Kumasi, Ghana

出　　处：《American Journal of Plant Sciences》2024年第12期1145-1161,共17页美国植物学期刊(英文)

摘　　要：A multi-locational field experiment was conducted to evaluate the effects of increasing rates of nitrogen and phosphorus on sweetpotato growth and yield at Bawku and Nyankpala. Shoot yield increased by 31%, 63%, 94% and 125% in Bawku and 49%, 98%, 148% and 197% in Nyankpala, when nitrogen was applied at 30, 60, 90 and 120 kg∙ha−1, respectively. When nitrogen was applied at 30, 60, 90 and 120 kg∙ha−1, storage root yield increased by 30, 46, 48, and 37% in Bawku and by 13, 17, 14 and 3% in Nyankpala, respectively. The optimum nitrogen required to maximize storage root yield were 80 and 62.5 kg∙ha−1 for Bawku and Nyankpala, respectively, in a split application at 2 and 6 weeks after planting. Storage root yield increased by 4%, 5%, 2% and −4% in Nyankpala and by 54%, 81%, 82%, 56% in Bawku, when 40, 80, 120 and 160 kg P were applied. Optimum phosphorus required to produce the highest storage root yield in this study are 67.5 and 101.3 t∙ha−1 for Nyankpala and Bawku, respectively. The maximum net return to investment occurred when 60 kg N∙ha−1 and 40 kg P∙ha−1 were applied at Bawku and Nyankpala, respectively.A multi-locational field experiment was conducted to evaluate the effects of increasing rates of nitrogen and phosphorus on sweetpotato growth and yield at Bawku and Nyankpala. Shoot yield increased by 31%, 63%, 94% and 125% in Bawku and 49%, 98%, 148% and 197% in Nyankpala, when nitrogen was applied at 30, 60, 90 and 120 kg∙ha−1, respectively. When nitrogen was applied at 30, 60, 90 and 120 kg∙ha−1, storage root yield increased by 30, 46, 48, and 37% in Bawku and by 13, 17, 14 and 3% in Nyankpala, respectively. The optimum nitrogen required to maximize storage root yield were 80 and 62.5 kg∙ha−1 for Bawku and Nyankpala, respectively, in a split application at 2 and 6 weeks after planting. Storage root yield increased by 4%, 5%, 2% and −4% in Nyankpala and by 54%, 81%, 82%, 56% in Bawku, when 40, 80, 120 and 160 kg P were applied. Optimum phosphorus required to produce the highest storage root yield in this study are 67.5 and 101.3 t∙ha−1 for Nyankpala and Bawku, respectively. The maximum net return to investment occurred when 60 kg N∙ha−1 and 40 kg P∙ha−1 were applied at Bawku and Nyankpala, respectively.

关 键 词：SWEETPOTATO Apomuden Storage Root Nitrogen Phosphorus Guinea Savannah Sudan Savannah 

分 类 号：S53[农业科学—作物学]