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Improving Yield And Quality of Leucaena

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Title:Improving Yield And Quality of Leucaena
Authors:Hegde, Narayan Ganape
Date Issued:1983
Abstract:Three studies were conducted with objectives of improving yield and quality of leucaena forage.
An experiment was conducted in a split-split plot design with five harvests, four levels of irrigation and three accessions (K8, K500 and K4) as main plot, sub-plot and sub-sub-plot treatments respectively. Forage was harvested at 48 to 78 days intervals at 30-50 cm height. The initial rate of growth of K8 was the heighest and of K4 was the lowest. Forage yield was significantly high when crop was irrigated to fully compensate the evaporation losses which was the highest level irrigation treatment. Under well distributed rainfall conditions of Hawaii, soil moisture level of control treatment was well above the critical level of moisture requirement for leucaena. Therefore marginal increase in the soil moisture level through the intermediate levels of irrigation did not increase the yield. K8 and K500 yielded significantly higher than K4. There was no difference in DM yield of K8 and K500. However K8 was found to be superior to K8 for forage production due to higher protein yield, higher foliage fraction and low mimosine content. Forage yield and rate of stem elonation were high in summer and low in winter. The reverse was true for total nitrogen, mimosine and foliage fraction of the forage. Solar radiation was the most important factor which influenced the yield.
In a leucaena leaf meal (LLM) feeding trial on growing Japanese quail, following six deitary treatments were included to study the effects of three types of LLM varying in mimosine and tannin contents; Positive control (normal diet with corn and soymeal), negative control (15% alfalfa leaf meal), TLM (15% leucaena K8 tender leaf meal with high mimosine and low tannin), MLM (15% K8 matured leaf meal with low mimosine and high tannin), LM (15% L. diversifolia K156 leaf meal with low mimosine and low tannin) and PVP (MLM diet with 1% polyvinyl pyrrolidone). Weight gain was the lowest in TLM, highest in positive and negative controls and intermediate in MLM, LM and PVP dietary treatments. The difference was noticable by the end of the first week of the trial. Results indicated that mimosine was probably the major cause of poor growth. There was no significant variation in the weight gain due to the difference tannin content of the diets. Supplimentation of PVP was beneficial in this trial.
In another study, leucaena accessions maintained at the University of Hawaii, University of the Philippines at Los Banos and Perum Perhutani, Indonesia were screened for low mimosine and high vigor. 31 accessions from the University of Hawaii and one accession from the Perum Perhutani were selected. A forage yield trial has been laid out at the Experiment Station, Waimanalo, to test the yield potentials of these accessions.
Appears in Collections: M.S. - Horticulture

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