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Effect of Spacing on P and Zn Uptake of Local T. Aman Rice Varieties in Khulna Area

S. Parvin
Lecturer
Agriculture Studies, Govt. Bangabandhu College, Rupsha , Khulna

M. M. Is!am
Professor
Agrotechnology Discipline, Khulna University, Khulna

M. K. Mondal
Collaborative Research Scientist
IRRI, Dhaka , Bangladesh

K. G. Quddus
Professor
Agrotechnology Discipline, Khulna University, Khulna

A.M. Mahmud
NGO Focal Person, OAK DlYE JAl

Abstract/ Executive Summary:

A field experiment was conducted at the Agronomy field of Khulna University, Khulna during T. Aman season to evaluate the effects of spacing on nutrient content and total uptake of phosphorus and zinc by grain and straw of traditional rice of Khulna region. The experiment was laid out in split-plot design with three replications assigning three varieties viz., Jotai, Bashfulbalam , Ranisalute and three spacings viz., 30 cm x 30 cm, 40 cm x 40 cm and 50 cm x 50 cm. The variety was assigned in main plot and spacing in sub plot. The plot was fertilized with 40-50-35-5 kg of Urea-TSP-MOP and ZnS0₄ ha^-l respectively. The results indicated that the single effect of variety and spacing on P and Zn content in grain and straw varied significantly while the straw P content was found insignificant. The interaction effect of variety and spacing on P and Zn content was found significant in all the treatments. The highest P and Zn content of grain was found from the variety Ranisalute at 50 cm x 50 cm (V₃S₁) but in straw from Ranisalute 40 cmx 40 cm (V₃S₂) and Bashfulbalam 30 cmx 30 cm (V₂S₁), respectively. The total uptake of P and Zn was found the highest from Jotai variety at 30 cm x 30 cm spacing. From the interaction it showed that the highest P and Zn uptake was found from Jotai 30 cmx 30 cm (V₁S₁) and the lowest from Ranisalute x 50 cm x 50 cm (V₃S₃). The study indicated that though wider spacings of 40 cm x 40 cm and 50 cm x 50 cm increased the number of tillers hill^-l and nutrient uptake but it cannot increase the nutrient uptake and grain yield tha^-l. So, 30 cm x 30 cm spacing showed positive relationship on nutrient uptake than 40 cm x 40 cm and 50 cm x 50 cm spacing.

Keywords: T. Aman, Spacing, Uptake of phosphorus and zinc

Location: Agronomy field of Khulna University, Khulna

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To find out the effect of spacing on the uptake and content of P and Zn of local T. Aman rice varieties of Khulna area.

Methodology:

The experiment was conducted in the field of Agro technology Discipline at Khulna University during T. Aman season. The soil was characterized by medium textured silty loam having pH value 7.5 and organic matter 3.80%. Before raising seedlings in the nursery, seeds were water soaked for 24 hours and these were kept in jute bags in dark conditions. After sprouting, the seeds were sown in wet seed bed . Thirty days old seedlings were uprooted carefully from the nursery and transplanted as single seedling hill^-1 on the well puddled experimental plots. Three popular T. Aman rice varieties viz, Jotai (V₁), Bashfulbalam (V₂) and Ranisalute (V₃) were selected for the study. The varieties were planted in three different spacing viz, 30 cm x 30 cm (S₁), 40 cm x 40cm (S₂) , and 50 cm x 50 cm (S₃). The variety was assigned in main plot and spacing in sub plot. The plot size was 4.0 m x 2.5 m. The land was fertilized with 40-50-35-5 kg of urea-TSP-MoP ZnS0₄ ha^{- 1} respectively. The full dose of fertilizers and half of urea was applied as basal dose during final land preparation and the remaining half of urea was applied in two splits at active tillering and during panicle initiation stage. Grain yield and straw yield were recorded from whole plot basis leaving boarder lines. Grain yield was adjusted at 14% moisture content. In order to conduct chemical analysis during harvest five representative samples of grain and straw from each sub plot were collected. The collected samples were analyzed and Phosphorus (P) was determined by Spectrophotometer and Zinc (Zn) by atomic absorption spectrophotometer. The data was analyzed following standard statistical procedures (Gomez and Gomez, 1984) using a computer operated program MSTATC.

Source of Information: Bangladesh Agron. J 2014, 17(1): 81-88

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The overall results of the present study showed that the single and interaction effect of variety and spacing showed significant influence on phosphorus and zinc content in grain and straw but the straw phosphorus content was insignificant from the single effect of variety and spacing. The uptake of phosphorus and zinc was found the highest in closer spacing than wider spacing. The number of tillers square meter^-1 was more in closer spacing 30 cm x 30 cm than wider spacing 40 cm x 40 cm and 50 cm x 50 cm . So, it can be the concluded that the uptake of nutrient depends on number of tillers square meter^-1 than number of tillers hill^-1.

Knowledge Management: Journal