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Phosphorus and Boron Effects on Nodulation and Yield of Soybean Under Non-saline Agro-ecosystem of Patuakhali

S. Shabnam
MS Student
Department of Agronomy, Patuakhali Science and Technology University, Dumki, Patuakhali.

S. Ahmed
Professor
Department of Agronomy, Patuakhali Science and Technology University, Dumki, Patuakhali.

S. Mia
Professor
Department of Agronomy, Patuakhali Science and Technology University, Dumki, Patuakhali.

Abstract/ Executive Summary:

The field experiment was conducted at Agronomy Field of Patuakhali Science and Technology University, Patuakhali during the period from December 2019 to May 2020 to evaluate the effect of phosphorus (P₀ = 0 kg P ha^-1, P₁ = 30 kg P ha^-1, P₂ = 60 kg P ha^-1, P₃ = 90 kg P ha^-1) and boron (B₀ = 0 kg B ha^-1, B₁ = 4 kg B ha^-1, B₂ = 6 kg B ha^-1) and their combinations on nodulation and yield attributes of soybean. The number of nodules plant^-1, the number of pods plant^-1, the number of seeds pod, 1000-seed weight, seed yield, stover yield, biological yield, and harvest index increased significantly up to 60 kg P ha^-1. On the other hand, the number of nodules plant^-1, number pods plants^-1, number of seeds pod^-1, 1000-seed weight, seed yield, stover yield, biological yield, and harvest index of soybean were enhanced significantly up to 4 kg B ha^-1. The combination of 60 kg P ha^-1 and 4 kg B ha^-1 depicted the highest number of nodules (177.8), plant height (75.60 cm), number of pods plant^-1 (92.72), number of seeds pod^-1 (2.92), the weight of 1000-seed (155.3 g) seed yield (1.91 t ha^-1), stover yield (2.98 t ha^-1), biological yield (4.89 t ha^-1) and harvest index (39.06%). Thus, the combined application of 60 kg P ha^-1 and 4 kg B ha^-1 could be the optimum for getting the maximum yield of soybean.

Keywords: Soybean, Nodule, Phosphorus, Boron, Yield

Location: Agronomy Field Patuakhali Science and Technology University, Dumki, Patuakhali

Start Date: 00-12-2019

End Date: 00-05-2020

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Soybean

Objectives:

To determine the optimum level of phosphorus and boron as well as their combinations for the maximum growth and yield performance of soybean at the coastal area.

Methodology:

The field experiment was conducted at Agronomy Field Patuakhali Science and Technology University, Dumki, Patuakhali during the period December 2019 to May 2020. The pre-cropping soil of the experimental field (0-15 cm depth) was determined as silty loam texture having pH – 6.6, organic matter – 1.10%, total nitrogen – 0.23%, P – 13.9 ppm, exchangeable K – 14.3 meq 100 g soil-1, S – 18 ppm and B – 59 ppm. The experiment was laid out in a factorial randomized complete block design with 3 replications. The variety BARI soybean 6 was used as a test crop. The unit plot size was 4 m ´ 3 m, spacing 30 cm ´ 10 cm. The experiment consisted of two factors with four different levels of phosphorus such as P₀: 0 kg P ha^-1, P₁: 30 kg P ha^-1, P₂: 60 kg P ha^-1, P₃: 90 kg P ha^-1, and 3 levels of boron such as B₀: 0 kg B ha^-1, B₁: 4 kg B ha^-1 and B₂: 6 kg B ha^-1. Half of the area and the entire amount of other fertilizers was applied as basal during final land preparation and the remaining half of urea was applied as top dressed after 21 days and 55 days after sowing. The soil moisture was maintained around 60% field capacity by supplying irrigation water at different dates. Different intercultural operations and plant protection measures were taken as and when necessary to raise healthy crops. The seeds of soybean were sown on 20 December 2019. The total number of nodules plant^-1 was counted on five plants in different growth stages seedling, pre-flowering, and flowering stages (i.e., 30, 60, and 90 days after sowing) to evaluate the nodulation pattern (Mete, 2015). The counted nodule number^-1 then averaged them to have the nodule number plant^-1. Harvesting was done on 18 April 2020. Data were collected on an individual plant basis and seed yield plant^-1 (g) was estimated after cleaning and proper drying. The yield of individual plots excluding the broader plants was recorded and then converted to t ha^-1. Plant performance was recorded taking measurements on plant height, number of pods plant^-1, number of seeds pod^-1, the weight of 1000-seeds, seed yield, stover yield, biological yield, and harvest index. The collected data on different parameters were analyzed using the Analysis of variance technique with the help of the MSTAT-C computer program and the mean difference were compared by the least significant test (LSD) at a 5% level of significance.

Source of Information: Bangladesh Agron. J. 2020, 23(2): 127-133

Article Link (Online Journal): DOI: https://doi.org/10.3329/baj.v23i2.52465

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The present study revealed that the application of P and B fertilizers influenced nodule formation, yield attributes, and seed yield of soybean. The application of 60 kg P ha^-1 and 4 kg B ha^-1 could be the most suitable levels for maximum productivity of soybean under the non-saline agro-ecosystem of Patuakhali.

Knowledge Management: Journal