Influence of lablab purpureus cover crop and crop residues on water productivity under irrigated maize in the Usangu plains, Tanzania

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dc.contributor.authorMlengera, Ndabhemeye
dc.date.accessioned2026-05-13T13:50:31Z
dc.date.available2026-05-13T13:50:31Z
dc.date.issued2008
dc.descriptionDissertation
dc.description.abstractThis study was conducted in the Usangu plains to investigate the influence of maize crop residues and lablab cover crop live mulch on moisture conservation in irrigated maize. Irrigated maize under bare seed bed, maize crop residue mulch, lablab live mulch and mixture of maize crop residue and live lablab mulches were evaluated with respect to 7 and 14 days irrigation intervals. Split plot design was employed, irrigation intervals of 7 and 14 assigned to main plots while mulches treatments assigned to sub plots.experiment had a total of 8 treatments replicated three times; four treatments being under 7-day irrigation interval and another four under 14 days irrigation interval. Irrigation depths of 30, 40 and 50 mm were applied at establishment, vegetative and tasselling to maturity stage of the maize crop respectively. The results show that treatments two (T2) and three (T3) which were under 7 days irrigation interval and mulched with maize crop residues and lablab live cover crop respectively had higher yield significant difference when compared to T7 treatment which was under 14 days irrigation interval and mulched which were irrigated once in every two weeks T6, T7 and T8 indicated high soil volumetric moisture content (VMC) in their respective order from 0 to 45 cm soil depths compared to T5 treatment which had no mulch. Water productivity (WP) with respect to with lablab live cover crop. All other treatments which were under 7 and 14 days irrigation irrigation water was higher for treatments which had 14 days irrigation interval (0.8 - 0.94 kg/m3) compared to those treatments which were under 7 days irrigation interval (0.61 - 0.63 kg/m3) indicating a significant difference. Most of the treatments which were irrigated once in every two weeks also showed higher WP with respect to crop water use weeks in this study has indicated to be an appropriate strategy for increased WP and water saving of about 30%, while causing insignificant maize grain yield loss.
dc.description.sponsorshipMinistry of Agriculture, Food and Cooperatives
dc.identifier.urihttps://www.suaire.sua.ac.tz/handle/20.500.14820/7568
dc.language.isoen
dc.publisherSokoine University of Agriculture
dc.subjectLablab cover crop
dc.subjectIrrigated maize
dc.subjectCrop residues
dc.subjectLablab mulches
dc.subjectUsangu
dc.titleInfluence of lablab purpureus cover crop and crop residues on water productivity under irrigated maize in the Usangu plains, Tanzania
dc.typeThesis

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