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Effects of Different Levels of N and P on the Yield of BINAdhan7 in Old Brahmaputra Floodplain Soil

A.R.A. Wakel
Department of Soil Science, 1Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202

M.M. Hossain
Department of Soil Science, 1Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202

N. Mohammad
Department of Soil Science, 1Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202

K. Sarker
Department of Soil Science, 1Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202

Abstract/ Executive Summary:

A field experiment was carried out in Old Brahmaputra Floodplain soil at Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during aman season of 2011 to study the response of Binadhan7 to different levels of nitrogen and phosphorous. The experiment was laid out in a randomized complete block design with four replications. There were seven treatments such as T1: Control, T2: Recommended fertiliser dose ( RFD) + N0P0, T3: RFD, T4: RFD-20% NP, T5: RFD-40% NP, T6: RFD + 20% NP and T7: RFD + 40% NP. The recommended fertilizer dose used for the study was 80 kg N, 25 kg P, 35 kg K, 10 kg S and 4 kg Zn ha^-1. Nitrogen, phosphorus, potassium, sulphur and zinc were applied through urea, TSP, MoP, gypsum and zinc oxide, respectively. The application of N and P had a significant influence on plant height, effective tiller hill^-1, panicle length and filled grains panicle^-1. The N and P uptake by rice plant did not increase considerably due to the different rates of N and P compared to RFD. The grain and straw yield of BINA dhan7 were significantly affected due to treatments. The highest grain and straw yield were 5.47 t ha^-1 and 6.58 t ha^-1, respectively in the treatment T7 (RFD + 40% NP) where all of N and P fertilizers were applied in higher level. From this study it can be concluded that the treatment T3 (RFD) is the best for the successful production of BINA dhan7 in Old Brahmaputra Floodplain soil.

Keywords: Nitrigen, Phosphorus, Binadhan7, yield

Location: Old Brahmaputra Floodplain soil at Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh

Start Date: 00-07-2011

End Date: 00-11-2011

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

1. To study the effect of different levels of N and P on the yield and nutrients content of Binadhan7.

Methodology:

The field experiment was carried out in Old Brahmaputra Floodplain soil at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during aman season of 2011 to study the response of Binadhan-7 to different levels of nitrogen and phosphorous. There were seven treatments such as T1: Control, T2: RFD + N0P0, T3: RFD, T4: RFD-20% NP, T5: RFD-40% NP, T6: RFD + 20% NP and T7: RFD + 40% NP. The experiment was laid out in a randomized complete block design with four replications. Thus, the total numbers of the unit plots were 28 (4x7). The unit plot size was 4m × 2.5 m; the plots were separated from each other by 0.5 m bunds. There were 1 m drains between the blocks. The initial soil sample was collected before land preparation from the plough depth layer (0-15 cm) from 10 locations covering the whole experimental plot. The composite sample was air dried, ground and sieved through a 20-mesh sieve and stored in a plastic bag for physical (textural class) and chemical (OM, pH, total N, available P & S, exchangeable K, Na & Ca and CEC) analysis. The land was prepared by ploughing and cross ploughing with a power tiller. Then the land was made saturated with irrigation water and prepared by successive ploughing, cross ploughing and laddering. All kinds of weeds, stubbles and crop residues were removed from the field before final ploughing and leveling. The full dose of TSP, MOP, gypsum and zinc oxide were applied as basal dose during final land preparation while urea was applied in three equal splits. The seedlings of 21 day old were transplanted maintaining plant spacing 20 cm x 20 cm. Three seedlings were transplanted in each hill. Intercultural operations were done in order to ensure and maintain the normal growth of the crop as and when necessary. When 90% of grain became golden yellow in color, 10 hills (excluding border hills) were randomly selected from each unit plot for recording data on different agronomic crop characters. The grain and straw samples from each plot taken for chemical analysis following appropriate methods. The N and P in the digest were determined in the same method as used in soil chemical analysis. The analysis of variance for various crop characters and also for various nutrients concentrations and nutrient uptake was done following the F-test. Mean comparisons of the treatments were made by the Duncan's Multiple Range Test. Correlation statistics was performed to examine the interrelationship among the plant characters under study.

Source of Information: J. Agrofor. Environ. 7 (2): 205-210, 2013; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The application of N and P had a significant influence on plant height, effective tiller hill^-1, panicle length and filled grains panicle^-1. The N and P uptake by rice plant did not increase considerably due to the different rates of N and P compared to RFD. The grain and straw yield of Binadhan7 were significantly affected due to treatments. The highest grain and straw yield were 5.47 t ha^-1 and 6.58 t ha^-1, respectively in the treatment T7 (RFD + 40% NP) where all of N and P fertilizers were applied in higher level. From this study it can be concluded that the treatment T3 (RFD) is the best for the successful production of Binadhan7 in Old Brahmaputra Floodplain soil.

Knowledge Management: Journal