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Effect of Number of Seedlings Per Hill and Spacing on Growth and Yield of Transplanted Aman Rice (var. Ranisalute)

Bidhan Chandro Sarker*
Agrotechnology Discipline, Khulna University, Khulna 9208, Bangladesh

Nazmun Nahar
Agrotechnology Discipline, Khulna University, Khulna 9208, Bangladesh

Abstract/ Executive Summary:

A field experiment was conducted with a view to examining the effect of number of seedlings hill-1 and spacing of planting on the growth and yield of transplanted aman rice (var. Ranisalute). The experiment consisted of five different number of seedlings hill-1 viz. 2, 3, 4, 5 and 6 and three plant spacing viz. 50 cm × 50 cm, 40 cm × 40 cm and 30 cm × 30 cm. The experiment was laid out in a factorial randomized complete block design with three replications. Individually number of seedlings hill-1 and spacing had no significant effect on growth and yield components. Numerically the highest grain yield and harvest index was obtained from 6 seedlings hill-1 and of 30 cm × 30 cm spacing separately. There were significant variation in the interaction effect of seedling hill-1 with spacing on the yield components except panicle length and 1000-grain weight. Among the interactions 3 seedlings hill-1 with 30 cm × 30 cm spacing produced the highest grain yield and harvest index, the uppermost straw yield and biological yield was obtained from 2 seedlings with 30 cm × 30 cm spacing and maximum grain panicle-1 was produced by 2 seedlings with 40 cm × 40 cm spacing.

Keywords: Aman, Ranisalute, Spacing of seedlings, Growth, Yield

Location: Experimental field of Khulna University

Start Date: 00-08-2015

End Date: 00-01-2016

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

Obulamma and Reddeppa (2002) reported that one seedling hill-1 gave the highest grain yield, crop growth rate and net assimilation rate while three seedlings hill-1 had the highest dry matter production, leaf area index and leaf area density. Therefore, the present study was conducted to examine the effect of number of seedlings hill-1 and spacing on the growth and yield attributes of local transplanted aman rice (var. Ranisalute).

Methodology:

The experiment was conducted in the experimental field of Khulna University during the Aman season from August 2015 to January 2016. There were five different number of seedlings hill-1 viz. 2, 3, 4, 5 and 6 and three plant spacing’s viz. 50 cm × 50 cm, 40 cm × 40 cm and 30 cm × 30 cm. The experiment was laid out in a factorial randomized compete block design with three replications. There were 45 plots altogether- 15 plots in each replication. The size of a plot was 4.0 m × 2.5 m. Seeds of Ranisalute were collected from a farmer of Batiaghata upazila of Khulna district. Seedlings were raised in wet seedbed with proper care. Plots were prepared and uniformly fertilized with Urea, TSP, MoP, Gypsum and Zinc Sulphate @ 180, 100, 70, 60 and 10 kg ha-1 respectively (recommendation dose for the area). Half of urea and full dose of TSP, MoP, Zinc Sulphate and Gypsum were applied during final land preparation and incorporated with the soil. Rest of the urea was top dressed in three equal splits at 20, 45 and 60 days after transplanting. The seedlings were uprooted carefully when they were 30 days old and were kept in soft mud under shade and transplanted on 1st September 2015 with number of seedlings hill-1 as specified in the treatment. The seedlings were transplanted carefully maintaining the spacing as per treatment specification. Intercultural operations were done as and when necessary. The whole plots were harvested at their full maturity stage to obtain grain and straw yield. Threshing was done manually. Grains and straw were cleaned and adjusted at 14% moisture content. Parameters such as, plant height, number of tillers hill-1, number of effective tillers hill-1, panicle length, number grains panicle-1, 1000-grain weight, grain yield, straw yield, biological yield and harvest index were estimated and analyzed with the help of MSTAT-C and Duncan’s New Multiple Range Test (Gomez and Gomez, 1984).

Source of Information: Khulna University Studies Volume 14 (1 & 2): 27-38: January-December 2017

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The results of the study indicate that individually number of seedling hill-1 and spacing had no significant effect on all the growth and yield contributing parameters but in case of interaction between the number of seedlings hill-1 and spacing had significant effect on plant height (except 90 DAT, 105 DAT and at harvest), number of tillers hill-1 (except 90 DAT, 105 DAT and at harvest), number of effective tillers hill-1, grains panicle-1, 1000-grain weight, grain yield, straw yield, biological yield and harvest index. Separately number of seedlings and spacing had no significant effect on growth and yield parameters of rice. Numerically the highest value of almost all the growth and yield parameters were obtained from 5 seedlings hill-1 (T4) except panicle length, grain panicle-1 and 1000 grain weight. On the other hand highest value of all the growth and yield parameters were obtained from 30 cm x 30 cm (S3) except panicle length and grain panicle-1. But in the interaction effect 3 seedlings hill-1 with 30 cm x 30 cm spacing (T2S3) produced the highest grain yield and harvest index.

From the result of this study it can be concluded that the increase of seedlings hill-1 (6 seedlings) increased grain yield and harvest index, whereas in case of spacing, the closest spacing of 30 cm x 30 cm produced the highest yield. But among the interaction of seedling numbers hill-1 and spacing, 3 seedlings hill-1 with 30 cm x 30 cm spacing gave the highest grain yield and harvest index.

Knowledge Management: Journal