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Effect of Npksznb on Yield and Yield Contributing Characteristics of Cowpea (2017 - 2018)

S.AKTAR,
Pulses Research Centre, BARI, Ishurdi, Pabna

M.A.HOSSAIN,
Pulses Research Centre, BARI, Ishurdi, Pabna

M. Z. RAHMAN,
Pulses Research Centre, BARI, Ishurdi, Pabna

M.S. ZAMAN
Pulses Research Centre, BARI, Ishurdi, Pabna

B.L.NAG

Abstract/ Executive Summary:

A field experiment was conducted at Regional Agricultural Research Station, Bangladesh Agricultural Research Institute, Rahmatpur, Barisal and Regional Pulses Research centre Madaripur during rabi season of 2016-17 to estimate the effective dose of mineral nutrients for cowpea yield maximization. Five treatments were included in the study viz. T₁₌ (Control), T₂₌ (20-20-20 NPK kg/ha), T_{3 =}(20-20-20-10 NPKS kg/ha), T₄₌ (20-20-20-10-2 NPKSZn kg/ha) and T₅₌ (20-20-20-10-2-1.5 NPKSZnB kg/ha).The yield of cowpea increased significantly due to the application of S, Zn and B. The highest seed yield (1612kg /ha) at Barisal and (1885kg /ha )at Madaripur were produced in treatment T₅(20-20-20-10-2-1.5 NPKSZnB kg/ha) and the lowest obtained from control plot (1438 kg/ha )and (971kg/ha)respectively.

Keywords: Fertilizer, Cowpea, Boron, Zink

Location: The field experiment was conducted at Regional Agricultural Research Station, Bangladesh Agricultural Research Institute, Rahmatpur, Barisal and Madaripur

Start Date: 00-00-2016

End Date: 00-00-2017

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Cowpea

Objectives:

A large efforts needs to be made to break the yield barriers. Under the above circumstances, management of fertilizer may be the way to increase the yield of cowpea.

Methodology:

The field experiment was conducted at Regional Agricultural Research Station, Bangladesh Agricultural Research Institute, Rahmatpur, Barisal and Madaripur during rabi season of 2016-17.The trial consisted of five treatments such as T₁=Control, T₂= 20-20-20 NPK kg/ha, T₃= 20-20-20-10 NPKS kg/ha, T₄=20-20-20-10-2 NPKSZn kg/ha, T₅=20-20-20-10-2-1.5 NPKSZnB kg/ha. The experiment was laid out in a Randomized Complete Block design with 3 replications. The unit plot size was 4m×3m. The nutrient status of the initial soil sample of the experimental plot at Rahmatpur, Barisal and at Madaripur is recorded. All the fertilizers were applied and incorporated into the soil during final land preparation. The variety was BARI Felon-1. Seeds were sown at the rate of 50 kg ha^-1on 16 December 2016 at Barisal and 5 January 2017 at Madaripur. The seeds were sown in furrows at 40 cm x 10 cm spacing at a depth of 2 to 3 cm below the soil surface. Irrigation was applied twice at 15 and 30 days after sowing. Intercultural operations such as thinning, weeding, applying insecticides were done as and necessary. The mature pods of cowpea were harvested three times. At maturity, seed yield and yield contributing characters were recorded and collected data were analyzed statistically.

Source of Information: Annual Research Report 2017 - 2018, Pulses Research Centre, BARI, Ishurdi, Pabna

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Yield and yield characters of cowpea as influenced by different doses of nutrients at Barisa were recorded. The plant height did not vary significantly among the treatments at harvest. The highest plant height was observed in T₅(119.90 cm) followed by T₄(121.30 cm) and the lowest was in the control plot (106.30 cm). The maximum pod length was in the treatment T₅ (16.74 cm) followed by T₄(16.51 cm), T₃ (16.37 cm) and the lowest recorded from in control (15.90 cm). Although the higher number of pods/plant was recorded in the treatment T₅ (17.87) but was statistically similar with T₄ (17.13). The lowest number of pods/plants was produced in the control treatment (T₁) (14.87). Seeds per pod were varied significantly among the treatments T₅ (15.27), T₄ (15.07) and T₃ (14.67). The minimum numbers of seeds were recorded in the treatment T₁(13.20). The highest 100 seed wt. was observed in treatment T₅ (11.76) followed by T₄ (11.06) and the least in treatment T₁ (9.22) where no nutrients were applied. The seed yield of cowpea varied significantly as influenced by different doses of nutrients. Although treatment T₂(1524 kg ha^-1), T₃ (1561 kg ha^-1) and T₄ (1587 kg ha^-1) did not differ in respect of seed yield significant difference was observed with T₁(1438 kg ha^-1) receiving no S i.e. the effect of S is evident. Application of Zn applied in the T₄ (1587 kg ha^-1)increased significantly higher yield that T₂ and T₃. Treatment T₅ produced the highest seed yield of cowpea (1612 kg ha^-1) than all other treatments differing statistically with T₄ express the contribution of B on the seed yield of cowpea. Foliar application of boron showed significant influence on the growth and yield of attributes of cowpea. The highest mean seed yield 1591 kg/ha was observed from the T5 treatment so farmers produced cowpea in Barisal region 1.5 kg/ha with a blanket dose. The mean seed yield of 2015 and 2016 also showed a similar trend and the highest average yield 1591kg ha^-1 was recorded in treatment T₅ (20-20-20-10-2-1.5 NPKSZnB kg ha^-1). Yield and yield characters of cowpea as influenced by different doses of nutrients at Madaripur shown in Table 4. The plant height did not vary significantly among the treatments at harvest. The highest plant height was observed in T5 (127.13 cm) followed by T₄(119.90 cm) and the lowest was in the control plot (114.46 cm). The maximum pod length was in the treatment T₅ (15.06 cm) followed by T₄(14.86 cm), T₃ (14.53 cm) and the lowest recorded from in control (14.06 cm). A higher number of pods/plant was recorded in the treatment T₅ (20.60) followed by T₄ (17.83). The lowest number of pods/plants was produced in control treatment T₁ (9.06). Seeds per pod were varied significantly among the treatments T₅ (15.86), T₄ (13.93) and T₃ (13.46). The minimum number of seeds was recorded in the treatment T₁(13.20). The highest 100 seed wt. was observed in treatment T₅ (10.76) followed by T₄ (10.36) and the least in treatment T₁ (10.00) where no nutrients were applied. The seed yield of cowpea varied significantly as influenced by different doses of nutrients. Treatment T₂(1182 kg ha^-1), T₃ (1293 kg ha^-1) and T₄ (1701 kg ha^-1) significantly differ in respect of seed yield but the least number of seed yield was observed with T₁(971 kg ha^-1) receiving no S i.e. the effect of S is evident. Application of Zn applied in the T₄ (1701 kg ha^-1) increased significantly higher yield that T₂ and T₃. Treatment T₅ produced the highest seed yield of cowpea (1885 kg ha^-1) than all other treatments differing statistically with T5 express the contribution of B on the seed yield of cowpea. Foliar application of boron showed significant influence on the growth and yield of attributes of cowpea. The highest seed yield 1885 kg ha^-1 was observed from the T5 treatment. Therefore, farmers produced cowpea in Madaripur region 1.5 kg ha^-1 with a blanket dose. The effect of nutrients on the growth and seed yield of cowpea is evident, T₅treatment(20-20-20-10-2-1.5 NPKSZnB kg/ha) showed a better response than other treatments both at Barisal (1612 kg/ha)) and Madaripur (1885kg /ha).

Knowledge Management: Report/Proceedings