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Vol.2 , No. 3, Publication Date: May 19, 2015, Page: 67-72
 on growth, yield, time of harvest and plant nutrient contents of cassava. Five levels of PM manure (10, 20, 30, 40 and 50 tha-1), a control treatment (0 tha-1) and 120:120:120 kgha-1 NPK (standard check) were compared in a randomised complete block design with three replicates. The growth data were subjected to analysis of variance (ANOVA). A combined ANOVA using a variation of a factorial design was used to assess the effects of time of harvest, levels of poultry manure and the possible interaction between time of harvest and levels of poultry manure on yield of cassava. The Duncan multiple range test (P=0.05) was used for mean separation. The test soil was sandy loam and deficient in organic matter and N (0.07%) with very low values in P, Ca, CEC and slightly acidic. Significant differences were observed in the growth parameters such as plant height (cm), stem girth (cm), length of internode (cm), number of leaves and branches/plant. The control, 10 tha-1 PM and NPK produced similar result in plant height. Higher levels of PM increased leaf area (cm2) and gave similar result with NPK. Time of harvest had significant effect on tuber weight (tha-1) with 12 months after planting (MAP) giving a higher significant value. The 50 tha-1 PM increased cassava root yield and biomass production by 39.8% and 24.5% compared to the control and NPK respectively, though these increases were not significant compared to other levels. The percent nutrient contents were highest in the tuber compared to the leaf and stem. The tuber accumulated more K than N, followed by Ca, Na and P. PM enhanced availability of nutrients to cassava. The results of this study have shown that PM levels increased growth parameters such as plant height, stem girth, number of leaves and branches/plant. The time of harvest (12 MAP) significantly increased tuber yield of cassava. Cassava planted using TMS 30572 can be harvested at 12 MAP using 10tha-1 PM.&picture=http://www.aascit.org/aascit/decorators/img/journal/923.jpg)
| [1] | Joy Odedina, Department of Plant Physiology and Crop Production, Federal University of Agriculture, Abeokuta, Nigeria. |
| [2] | Stephen Ojeniyi, Department of Crop, Soil and Pest Management, Federal University of Technology, Akure, Nigeria. |
| [3] | Samson Odedina, Department of Agronomy, Federal College of Agriculture, Akure, Nigeria. |
| [4] | Thomas Fabunmi, Department of Plant Physiology and Crop Production, Federal University of Agriculture, Abeokuta, Nigeria. |
| [5] | Victor Olowe, Institute of Food Security, Environmental Resources and Agricultural Research (IFSERAR), Federal University of Agriculture, Abeokuta, Nigeria. |
To increase the yield potential of cassava, the crop had been reported to respond to good soil fertility and adequate fertilizer. A field experiment was conducted at Federal College of Agriculture, Akure in south western Nigeria to compare the effects of levels of poultry manure (PM) on growth, yield, time of harvest and plant nutrient contents of cassava. Five levels of PM manure (10, 20, 30, 40 and 50 tha-1), a control treatment (0 tha-1) and 120:120:120 kgha-1 NPK (standard check) were compared in a randomised complete block design with three replicates. The growth data were subjected to analysis of variance (ANOVA). A combined ANOVA using a variation of a factorial design was used to assess the effects of time of harvest, levels of poultry manure and the possible interaction between time of harvest and levels of poultry manure on yield of cassava. The Duncan multiple range test (P=0.05) was used for mean separation. The test soil was sandy loam and deficient in organic matter and N (0.07%) with very low values in P, Ca, CEC and slightly acidic. Significant differences were observed in the growth parameters such as plant height (cm), stem girth (cm), length of internode (cm), number of leaves and branches/plant. The control, 10 tha-1 PM and NPK produced similar result in plant height. Higher levels of PM increased leaf area (cm2) and gave similar result with NPK. Time of harvest had significant effect on tuber weight (tha-1) with 12 months after planting (MAP) giving a higher significant value. The 50 tha-1 PM increased cassava root yield and biomass production by 39.8% and 24.5% compared to the control and NPK respectively, though these increases were not significant compared to other levels. The percent nutrient contents were highest in the tuber compared to the leaf and stem. The tuber accumulated more K than N, followed by Ca, Na and P. PM enhanced availability of nutrients to cassava. The results of this study have shown that PM levels increased growth parameters such as plant height, stem girth, number of leaves and branches/plant. The time of harvest (12 MAP) significantly increased tuber yield of cassava. Cassava planted using TMS 30572 can be harvested at 12 MAP using 10tha-1 PM.
Keywords
Cassava, Poultry Manure, Time of Harvest, Nutrient Contents
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