חיפוש מתקדם
Agronomy Journal
Danga, B.O., Dep. of Agricultural Resource Management, Kenyatta Univ., P.O. Box 43844-00100, Nairobi, Kenya
Ouma, J.P., Dep. of Crops, Horticulture and Soils, Egerton Univ., P.O. Box 536-20115, Njoro, Kenya
Wakindiki, I.I.C., Dep. of Agronomy, Univ. of Fort Hare, Private Bag X1314, King William's Town Road, Alice 5700, South Africa
Bar-Tal, A., Dep. of Soil Chemistry and Plant Nutrition, Institute of Soil, Water and Environmental Sciences, ARO, The Volcani Centre, P.O. Box 6, Bet-Dagan 50250, Israel
Stagnation in grain production in the developing world has contributed to the current worldwide food crisis. The principle objective of this study was to evaluate the possibility of improving grain production in the tropical humid region by chickpea (Cicer arietinum L.) in rotation with wheat (Triticum aestivum L). A 3-yr field experiment in Kenya included four short-rain-season (SRS) management practices (chickpea green manure [GM], mature chickpea grain crop [CG], tilled fallow [TF], and weedy fallow [WF]), and inorganic N fertilizer at three rates (0, 30, and 60 kg N ha-1). The chickpea treatments decreased SRS water storage at wheat planting by 14 to 16% compared with TF, but this did not affect yield of subsequent wheat. The GM accumulated 77 kg N ha-1 yr-1, compared with 42 kg N ha-1 yr-1 for the CG. The chickpea treatments increased soil available N by 19% and N uptake by wheat by 39% compared with the fallow methods. Inorganic N applications of 60 kg N ha-1 increased soil-available N at 30 d after sowing by 21.4% and N uptake by wheat by 47%. The CG and GM increased the average annual wheat grain yield by 14 and 31% compared with the WF and TF. Inorganic N applications of 30 and 60 kg N ha-1 increased wheat grain yield by 20 and 7%, respectively. The combination of GM with 30 kg N ha-1 gave the highest wheat grain yield, but CG with 30 kg N ha-1 fertilizer was the most profitable practice. © 2010 by the American Society of Agronomy.
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Chickpea-wheat rotation for higher production in a humid tropical region
102
Danga, B.O., Dep. of Agricultural Resource Management, Kenyatta Univ., P.O. Box 43844-00100, Nairobi, Kenya
Ouma, J.P., Dep. of Crops, Horticulture and Soils, Egerton Univ., P.O. Box 536-20115, Njoro, Kenya
Wakindiki, I.I.C., Dep. of Agronomy, Univ. of Fort Hare, Private Bag X1314, King William's Town Road, Alice 5700, South Africa
Bar-Tal, A., Dep. of Soil Chemistry and Plant Nutrition, Institute of Soil, Water and Environmental Sciences, ARO, The Volcani Centre, P.O. Box 6, Bet-Dagan 50250, Israel
Chickpea-wheat rotation for higher production in a humid tropical region
Stagnation in grain production in the developing world has contributed to the current worldwide food crisis. The principle objective of this study was to evaluate the possibility of improving grain production in the tropical humid region by chickpea (Cicer arietinum L.) in rotation with wheat (Triticum aestivum L). A 3-yr field experiment in Kenya included four short-rain-season (SRS) management practices (chickpea green manure [GM], mature chickpea grain crop [CG], tilled fallow [TF], and weedy fallow [WF]), and inorganic N fertilizer at three rates (0, 30, and 60 kg N ha-1). The chickpea treatments decreased SRS water storage at wheat planting by 14 to 16% compared with TF, but this did not affect yield of subsequent wheat. The GM accumulated 77 kg N ha-1 yr-1, compared with 42 kg N ha-1 yr-1 for the CG. The chickpea treatments increased soil available N by 19% and N uptake by wheat by 39% compared with the fallow methods. Inorganic N applications of 60 kg N ha-1 increased soil-available N at 30 d after sowing by 21.4% and N uptake by wheat by 47%. The CG and GM increased the average annual wheat grain yield by 14 and 31% compared with the WF and TF. Inorganic N applications of 30 and 60 kg N ha-1 increased wheat grain yield by 20 and 7%, respectively. The combination of GM with 30 kg N ha-1 gave the highest wheat grain yield, but CG with 30 kg N ha-1 fertilizer was the most profitable practice. © 2010 by the American Society of Agronomy.
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