Effects of Plant Population in Cassava (Manihot Esculenta Crantz) as Influenced by Planting Methods
The effects of two planting methods (20 cm cutting planted horizontally and 60 cm cuttings planted vertically) and plant populations ranging from 5,000 to 40,000 plants per hectare on the performance of two cassava varieties were investigated. The relationships of yield and yield components with p...
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| Format: | Thesis |
| Language: | English English |
| Published: |
1982
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/10194/1/FP_1982_3.pdf |
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| Summary: | The effects of two planting methods (20 cm cutting planted
horizontally and 60 cm cuttings planted vertically) and plant populations ranging from 5,000 to 40,000 plants per hectare on the performance of two cassava varieties were investigated. The relationships
of yield and yield components with plant populations were
examined by fitting linear and quadratic regression equations to each planting method and variety.
Results of the experiment show that in both varieties, the
horizontal planting yielded significantly better than vertical planting in terms of root and starch yields. The increase in root yield wit
variety MVen 119 was due to both increase in total root number and
harvest index. In variety MCol 673 the increase in root yield was
attributed mainly to increase in harvest index and decrease in shoot
number. Variety MVen 119 out yielded MCol 673 in terms of root yield
but the difference in starch yields between the two varieties was not
evident. However, variety MCol 673 is favoured because of its higher
starch content.
The yield response of the treatments to plant population showed
that root yield declined with in creasing plant population and that the
yield was highest for the lowest population tested in the study. Yield reduction at high plant populations was generally attributed to the
production of excessive shoots as well as to the decrease in mean root
weight and mean root length.
Root number was enhanced by planting horizontally and it also
showed an increasing trend with plant population which had been as-certained to be quadratic. |
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