Soil moisture deficit effect on nutrient contents of cassava leaves during the early and late cropping seasons in soils amended with poultry manure - palm bunch ash mixture

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Published: Oct 31, 2022
Keywords:
cassava leaves poultry manure palm bunch ash nutrient contents soil deficit

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N.A. Okoli
Department of Crop Science and Horticulture, Nnamdi Azikiwe University, Awka 420218, Nigeria
S.K. Okocha
Department of Food Science, Nnamdi Azikiwe University, Awka 420218, Nigeria

Abstract

Soil moisture deficit affects the translocation of nutrients for photosynthesis and the transformation of sucrose into various nutrient content in cassava leaves. The objective of the study was to compare the nutrient contents of cassava leaves as affected by poultry manure-palm bunch ash mixtures and cropping seasons with the hypothesis that poultry manure-palm bunch ash mixture could improve the nutrient contents of cassava leaves during the early and late cropping seasons. The treatments consisted of four rates of poultry manure (0, 5, 10, and 15 t ha-1) mixed thoroughly with four rates of palm bunch ash (0, 1, 2, and 3 t ha-1) and applied to the cassava variety TMS 30572 during the early and late cropping seasons. Zero application of poultry manure-palm bunch ash mixture was the control. The experimental design was a 4 × 4 × 2 factorial experiment in a completely randomized design and replicated three times. Application of 10 t ha-1 of poultry manure significantly (P < 0.05) lowered moisture content (75.95 ± 0.49%) but increased crude protein (18.26 ± 0.60%), vitamin C (6.93 ± 0.29 mg/100mg), and carbohydrate (30.46 ± 2.67 g) contents of cassava leaves while control produced cassava leaves with lower vitamin C (5.81 ± 0.10 mg/100mg) and crude protein (15.71 ± 0.06%) contents. Application of 2 t ha-1 of palm bunch ash significantly increased crude protein (17.85 ± 0.78%) and vitamin C (6.68 ± 0.07 mg/100mg) contents of cassava leaves while control produced cassava leaves with low crude protein (16.85 ± 0.47%) and vitamin C (6.05 ± 0.21 mg/100mg) contents. Moisture deficit during the late cropping season resulted in significantly (P < 0.05) lower crude protein (16.80 ± 0.11%) content of cassava leaves while the early cropping season had higher crude protein (18.07 ± 0.47%) content of cassava leaves. The application of 10 t ha-1 of poultry manure mixed with 2 t ha-1 of palm bunch ash is recommended for improved nutrient contents of cassava leaves during the early and late cropping seasons. The results of this study imply that the application of poultry manure-palm bunch ash mixture during the early and late cropping seasons can serve as a nutrient booster in cassava leaves, early cropping season is still the best period for the availability of high nutritive vegetables, while cassava leaves can cushion the effect of vegetable scarcity and malnutrition during the dry season.

Article Details

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Vol. 55 No. 1 (2022): January-March
Section
Research Articles
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