Preliminary Findings on Yield Response of Potatoes （Solanum tuberosum） to Umostart Super Zn （11.46,0 ＋ 2 Zn ＋ Humates）  

作　　者：C. Lung＇ aho M. Nyongesa M. Wakahiu 

机构地区：[1]Kenya Agricultural Research Institute-Tigoni, P.O. Box 338-00217, Limuru, Kenya

出　　处：《Journal of Agricultural Science and Technology(B)》2011年第5期728-734,共7页农业科学与技术（B）

摘　　要：Field trials to determine the yield response of potatoes to Umostart Super Zn （USZ） fertilizer （11.46.0 ＋ 2 Zn ＋ Humates） were carried out in 2004 using the cultivar Tigoni. During the long rains season, the treatments included USZ at 15 kg ha^-1 at planting; 30 kg ha^-1 split into 15 kg ha^-1 at planting and 15 kg ha^-1 during final earthing-up; 30 kg ha^-1 at planting; and 45 kg ha^-1 at planting. Treatments during the short rains included USZ at 30 kg ha^-1 split into 15 kg ha^-1 at planting and 15 kg ha^-1 during final earthing-up; 30 kg ha^-1 at planting; 40 kg ha^-1 at planting; 50 kg ha^-1 at planting; 50 kg ha^-1 split into 25 kg ha^-1 at planting and 25 kg ha^-1 during final earthing-up; and 60 kg ha^-1 at planting. USZ was contrasted with Diammonium phosphate （DAP） fertilizer （18：46：0） at 300 kg ha^-1 and 500 kg ha^-1 applied at planting and a control in which no fertilizer was applied. The DAP 300 kg ha^-1 treatment was however, not included during the long rains season. The highest tuber yields among the USZ treatments were obtained in plots treated with 45 kg ha^-1 （27.11 t ha^-1） during the long rains and 60 kg ha^-1 （55.17 t ha^-1） during the short rains season. Application of USZ resulted in a yield increase of at least 3.90 and 19.06 t ha^-1 during the long and short rains seasons respectively.

关 键 词：Fertilizers POTATO Solanum tuberosum tuber yield Umostart Super Zn 

分 类 号：S511[农业科学—作物学] S532