• Performance assessment of minimize of seedling and to increase yield

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  • 01/04/2016

This BSc thesis was completed by Yaismin arannum at Department of Agronomy & Agricultural extensionof the University of Rajshahi, Bangladesh



Rice, the major staple crop in Bangladesh, suffers from the impacts of climate change. The increase of rice yields and reduction of losses due to pests and diseases are important for national security. The performance is related to the number of seedlings per hill with 3-4 recognized as density minimizing losses.

The objective of this trial was to assess the performance of rice cultivated from different numbers of seedlings/hill with the goal to identify the most suitable seedling rate for each location to achieve the best possible rice yields.

This trial was conducted on farms participating in SAF-BIN project in Baraigram (Natore district), Paba (Rajshahi district) and Patnitala (Naogaon district). The rice variety BRIdhan 49 was cultivates. 21-25 days old seedlings were transplanted at a spacing of 20 x 15cm. The treatments were T1: reduced seedling rate 1 seedlings/hill and T2: normal seedling rate 3-5 seedlings/hill; arranged in a randomized complete block design with three replications. Fertilization and pest management were applied according to local practice. Data on fertile tillers/hill, thousand grain weight (TGW, g) and yield (t/ha) was collected.

Fertile tillers/hill differed significantly between treatments. In Paba and Patnitala the reduced seedling rate (T1) resulted in a higher number of fertile tillers/hill; while in Baraigram the normal seedling date produced more. Location had a significant influence on TGW: TGW was highest in Patnitala (23g), followed by Paba (20g) and Baraigram (18.1g). Treatments had no significant effect TGW.T1 achievew higher rice yield in Patnitala (5.3t/ha) and Paba (4.9t/ha); but in BaraigramT2 resulted in higher yield (4t/ha).There was strong positive correlation between fertile tillers/hill and grain yield (R2= 0.96).

Results are inconclusive when seedling rate is taken into account as influencing factor and imply a strong influence of location on the recorded traits.