Author: Anan PintarakPublisher:
ISBN:
Category : Cowpea
Languages : en
Pages : 322
Book Description
Effects of Composition of Haulms from Cowpea Crops (Vigna Unguiculata (L.) Walp.) on Growth and Yield of a Subsequent Wheat Crop
Author: Anan PintarakPublisher:
ISBN:
Category : Cowpea
Languages : en
Pages : 322
Book Description
Effect of Plant Growth Regulators on Growth, Yield and Seed Quality in Cowpea (Vigna Unguiculata (L.) Walp)
Author: GANAGER TAMMANNA SAssessing successive leaf yield performance of dual-purpose cowpea (Vigna unguiculata) to decrease seasonal shortage of nutrients in resource-poor small-scale households of Tanzania and Uganda
Author: Severin PolreichPublisher: Cuvillier Verlag
ISBN: 3736937008
Category : Science
Languages : en
Pages : 170
Book Description
This study presents a method to assess yield performance of dual-purpose cowpea types for human consumption and to reveal potentials for further improvement of its use as leafy vegetable. Eleven cowpea accessions with different genetic background and sample status were chosen from AVRDC’s working collection in Arusha, Tanzania. Among them, dual-purpose cowpeas like Dakawa, Ex Iseke and Ngoji were present that the center has been distributing to local farmers. Multi-location trials in typical cowpea production environments were established both on farm and on station in the regions Arusha, Dodoma, and Kilimanjaro in Tanzania and in Eastern Region, Uganda during the short and long rainy season 2007 and 2008, respectively. Young, tender leaves were picked in successive leaf harvests about every and two weeks until the plants did not produce further leaves. Cowpea seeds were harvested when pods reached 80% maturity. Data of yield parameters were analyzed with analysis of variance (ANOVA), stability analyses were carried out according to the dynamic and static concepts. Reliability of leaf and seed yield performances were calculated based on the probability of outperformance of local check cowpeas that were previously recommended by farmers and extension workers in informal group sessions. Through NIRS, crude protein and iron contents were assessed in leaves obtained from the second leaf harvests at the different locations and from up to subsequent leaf harvests. Dual-purpose utility for smallholders was assessed through (i) an index of superiority (Si), in which reliabilities of leaf yield across repeated leaf harvests and seed yield were weighed and combined to overall yield benefit of the ith accession, (ii) effective plot length for nutritional component XY, to calculate the length of a plot (in m) that needs to be planted to sustain a five-head household for ten days with a recommended amount of nutrients, and (iii) responsiveness (Resp), reflecting changes of leaf yield (compensation) relative to changes in seed yield (sensitiveness) if harvesting frequency was intensified. Performance of single leaf yields was strongly influenced by environmental factors and, only in Arusha, accession-specific. Interactions between yield reliability and stability were site-specific. Overall, test-accessions achieved higher reliabilities in seed yield than in leaf yield. Only in the on-station trial in Eastern Region, accession IT82D-889, and in the on-farm trial in Kilimanjaro, ILRI11114 and Ex Iseke showed leaf yield reliabilities above 0.50. Iron content in cowpea leaves was highly dependent on environmental influences and varied from 157.4 mg kg-1 to 286.1 mg kg-1. Leaf CP had a broad-sense heritability of 0.87. Across accessions and environments the mean leaf CP content ranged from 37.4% of DM (IT93K-2045-29) to 33.9% of DM (Sudan). CP and leaf dry matter (DM) yield had significantly negative correlation coefficients between. Means of effective plot length for crude protein and iron varied by more than 50% across environments. Although CP, in contrast to iron, was genetically determined, its impact on differences in effective plot length was negligible as well, as differences in production of leaf DM per m2 were by far larger among accessions than those of CP contents. It was recommended to favor accessions with short effective plot lengths and higher CP contents in leaf yields over those with short effective plot lengths and low CP contents. In contrast to determinate cowpeas, indeterminate types increased their DM gain in aerial plant parts of leaf-harvested plants relatively to unharvested plants. Indeterminate cowpeas responded with high leaf yield increases if leaves were picked twice a week. Consequently yields of total edible DM of these plant types, comprising added seed and leaf yields, increased with intensification of leaf-harvesting frequency from once to twice a week. Determinate plant types yielded highest in total edible DM when only seed was harvested or in less intensive leaf-harvesting scenarios. Accessions with favorable responsiveness, reflecting leaf yield changes relative to seed yield changes under intensified leaf-harvesting frequency, were Sudan, ILRI11114, and IT93K2045-29. In contrast, Resps of SAM45 and ILRI15742 were poorest. Traits have to be identified that could explicitly improve Resp of cowpea types. Improving quantitative yield parameters should not result in quality decrease. The dual-purpose characteristics of local checks were mainly superior to the eleven test-accessions pointing to a demand on improved leaf yield performance that is not merely total leaf yield amount but also the continuance during repeated leaf harvesting. By the proposed method the status quo of a defined location, i.e. site-specific demands on germplasm, can be included in the analysis, serving as benchmark for improvement if the local check is chosen carefully. Since single leaf yields are the results of fairly complex and dynamic interactions between plant physiological processes and environmental conditions it is essential to conduct participatory variety selection and plant breeding trials for dual-purpose assessments in target environments and not ex situ.
Lost Crops of Africa
Author: National Research CouncilPublisher: National Academies Press
ISBN: 0309164540
Category : Technology & Engineering
Languages : en
Pages : 378
Book Description
This report is the second in a series of three evaluating underexploited African plant resources that could help broaden and secure Africa's food supply. The volume describes the characteristics of 18 little-known indigenous African vegetables (including tubers and legumes) that have potential as food- and cash-crops but are typically overlooked by scientists and policymakers and in the world at large. The book assesses the potential of each vegetable to help overcome malnutrition, boost food security, foster rural development, and create sustainable landcare in Africa. Each species is described in a separate chapter, based on information gathered from and verified by a pool of experts throughout the world. Volume I describes African grains and Volume III African fruits.
Bibliography of Agriculture
Author: Effect of Plant Geometry and Levels of Phosphorus on Growth, Yield Andquality of Cowpea (Vigna Unguiculata L. Walp) Under Dryland Conditions
Author: Kapoor Singh YadavEnergy Allowances and Feeding Systems for Ruminants
Author: Great Britain. Ministry of Agriculture, Fisheries and FoodPublisher:
ISBN:
Category : Nature
Languages : en
Pages : 94
Book Description
Principles; Food energy; Measurements of metabolisable energy; Metabolisable energy of the ration; Matabolisable energy concentration of rations; Metabolisable energy requirements; Maintenance; Liveweight gain; Milk production; Mobilisation of body reserves; Pregnancy; A net energy system for growing animals; Net energy requirements; Net energy values of foods; Animal production level; Safety margins; Dairy cows; Calculation of metabolisable energy allowances; Liveweight change; Daily ME allowances; Appetite Limits for dairy cows; Checking a ration; Ration formulation; Rapid method; Linear programming; Feeding the dairy cow; Significance of liveweight changes; Ration formulation for stages of lactation; Feeding according to yield; Energy requirements of grazing cows; Growing and fattening cattle; Prediction of performance; Ration calculations; Predicted liveweight gain; Calculation of metabolisable energy allowances; Ration formulation; Rapid method; Linear programming; Net energy system for ration formulation; Animal production level; Net energy values of foods; Net energy allowances; Ration formulation; Replacement values of foods; Linear programming; Sheep; Pregnant and lactating ewes; Maintenance allowances; Pregnancy allowances; Ration formulation; Growing and fattening sheep; Performance prediction; Prediction of liveweight gain; Calculation of metabolisable energy allowances; Net energy system for ration formulation; Net energy allowances; Animal prodution level; Net energy values of foods; Replacement values of foods; Metabolisable energies of foods; Energy values of foods; Digestibility measurements of foods; Metabolisable energy values of foods; Prediction of the ME of forages; Estimation of the ME of compound foods; Tables of food composition.
Annual Report of the Senate for ...
Author: University of Western AustraliaPublisher:
ISBN:
Category :
Languages : en
Pages : 104
Book Description
Advances in Cowpea Research
Author: B. B. SinghPublisher: IITA
ISBN: 9789781311109
Category : Cowpea
Languages : en
Pages : 400
Book Description
Cowpea: taxonomy, genetics, and breeding, physiology and agronomy, diseases and parasitic weeds, insect pests, postharvest technology and utilization. Biotechnological applications.
Author: SEENAPPA C