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پاییز  95  برشما عزیزان  تبریک و تهنیت باد



EFFECTS OF COMMERCIAL RHIZOBIUM STRAIN INOCULANTS AND TRIPLE
SUPERPHOSPHATE FERTILIZER ON YIELD OF NEW DRY BEAN LINES IN
CENTRAL KENYA
Abstract
Annual demand for dry beans of 749,000 metric tons in Kenya is far above the annual production of 380,000
metric tons. Bean yield can be increased through the use of improved bean varieties, phosphate fertilizer and
Rhizobium inoculants. Small-scale farmers who are the major dry bean producers rarely apply fertilizers in bean
production; hence the crop is largely dependent on nitrogen fixation for its nitrogen requirement. Inoculation of
seed beans with appropriate Rhizobium strains for enhanced nitrogen fixation provides a more economical and
sustainable alternative to the application of nitrogenous fertilizers. A trial was conducted in 2007 during long
and short rains at KARI-Thika and on farmers’ fields in Kirinyaga and Maragua districts in Central Kenya to
investigate the effect of three commercial Rhizobium strain inoculants and triple superphosphate (TSP) fertilizer
on yield of new dry bean lines. TSP fertilizer consistently increased bean yields during the long and short rain
seasons at the research site (Thika) and on farmers’ fields in Kirinyaga and Maragua districts. Compared to
fertilizer effects on yield, inoculation effects were not as consistent and were of much lower magnitude. Most of
the bean lines had their highest yield where both fertilizer and Rhizobium inoculants were applied. Rhizobium
strain 2667 followed by mixed strain treatments tended to outperform the other inoculation treatments. Four of
the bean lines gave consistently high yields under the same inoculation treatment in different seasons and sites.
Key words: Rhizobium strain, Inoculation, Triple superphosphate fertilizer,
Farmers’ fields, Bean yield

نوع مقاله : انگلیسی  

مرتبط با : زراعت حبوبات - غلات - زراعت گیاهان علوفه ای

عنوان مقاله  :    اثرات ریزوبیوم های تجاری جوانه زا  و کود فسفات سه گانه در کشت لوبیا خشک در کنیای مرکزی 

EFFECTS OF COMMERCIAL RHIZOBIUM STRAIN INOCULANTS AND TRIPLE
SUPERPHOSPHATE FERTILIZER ON YIELD OF NEW DRY BEAN LINES IN
CENTRAL KENYA

مرجع مقاله :   KARI-Thika

سال انتشار:  2008

تعداد صفحات : 10 صفحه

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