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Response of Lentil to Zinc, Boron, and Molybdenum Application (2016--2017)

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

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

B. ANWAR
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

M.A. QUDDUS
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

Abstract/ Executive Summary:

A study was conducted at the research field of Pulses Research Sub-Station, Gazipur and RARS, BARI, Jessore during 2016-17 to estimate the effective doses of micronutrients (Zn, B and Mo) for lentil yield maximization in Bangladesh. There were 8 treatments viz. T₁= Control, T₂= Zn 2.0 kg ha^-1, T₃= B 1.5 kg ha^-1, T₄= Mo 1.o kg ha^-1, T₅= Zn_2.0B_1.5, T₆= Zn_2.0Mo_1.0, T₇= B_1.5Mo_1.0 and T₈= Zn_2.0B_1.5Mo_1.0 along with the blanket dose of N₁₅P₂₀K₃₀S₁₀ kg ha^-1. The experiment was designed as a randomized complete block with three replications. The results showed that the seed yields of lentil ranged from 785-1081 kg ha^-1 at Gazipur and 1292-1680 kg ha^-1 at Jessore, respectively. The average seed yield of the two locations ranged from 1093-1381 kg ha^-1. The highest lentil seed yield was obtained from the treatment T₈ at Gazipur and at Jessore. The lowest yield was found in the control plot. The highest net return was counted from T₈ treatment at Gazipur and at Jessore. The highest benefit-cost ratio 2.86 and 3.83 were counted from the treatment T₅ at Gazipur and Jessore, respectively. The lowest net return was calculated from the control treatment and the lowest benefit-cost ratio was also counted from the T₁ treatment at Gazipur and Jessore. Considering the benefit-cost ratio the micronutrient management practices of T₅= Zn_2.0B_1.5kg ha^-1 may be considered as economically sound and suitable dose for lentil yield maximization in calcareous and terrace soils of Bangladesh.

Keywords: Lentil, Micronutrient, Zn, B, Mo, Benefit-cost ratio

Location:

Start Date: 00-00-2016

End Date: 00-00-2017

Program Area: Crop-Soil-Water Management

Commodity: Micronutrient, Lentil

Objectives:

The present study was, therefore, undertaken (i) to evaluate the response of yield and yield contributing characters of lentil to micronutrient (Zn, B and Mo) application; and (ii) to find out the effective dose of micronutrient (Zn, B and Mo) for lentil yield maximization.

Methodology:

An experiment was conducted during the Rabi season of 2016-17 at the experimental field of PRSS, Gazipur and RARS, Jessore to find out the effective doses of micronutrients (Zn, B and Mo) for lentil yield maximization. There were 8 treatments viz. T₁= Control, T₂= Zn 2.0 kg ha^-1, T₃= B 1.5 kg ha^-1, T₄= Mo 1.o kg ha^-1, T₅= Zn_2.0B_1.5, T₆= Zn_2.0Mo_1.0, T₇= B_1.5Mo_1.0 and T₈= Zn_2.0B_1.5Mo_1.0 along with the blanket dose of N₁₅P₂₀K₃₀S₁₀ kg ha^-1. The initial soil samples and final soil samples were collected from the experimental field from 0-15 cm depth and the collected samples were analyzed for chemical properties using standard procedures in the laboratory. The experimental design was a randomized complete block with three replications. The unit plot size was 4 m x 3 m. The lentil variety BARI Lentil-7 was used. Lentils seeds at the rate of 30 kg ha^-1 were sown on 16 November 2016 at Gazipur and 20 November 2016 at Jessore. In each replication, the seeds were sown by maintaining the distance of row to row 30 cm with continuous seeding in line. Weeding was done two times-1^st 20 DAS and 2^nd 35 DAS. Others management practices were done properly. Data on grain yield were collected from the whole plot and stover data were counted from 2 square meters but all the yield components namely: plant height, branches/ plant, number of pods/plant, number of seeds /pod and 1000 seed weight were collected from ten plants selected randomly from each unit plot. Collected data were statistically analyzed through Statistix 10 package. In this study, BCR was analyzed for a hectare of land. Treatment-wise management cost was calculated by adding the cost incurred for labours and inputs for each treatment. The total yield after each harvest was calculated separately for every treatment and accumulated at the end of the final harvest. The total yield of each treatment was converted for determining yield (kg ha^-1). This yield was utilized to calculate the gross return. This was measured by multiplying the total yield by the unit price of lentil at that time. Net return was calculated by subtracting management cost from gross return.

Source of Information: Annual Research Report 2016--2017, Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Different micronutrient management practices showed a significant effect on the yield components of lentil during 2016-17 at Gazipur and Jessore. The plant height of lentil ranged from 23.9-28.1 cm at Gazipur and 30.6-35.6 cm at Jessore. The highest plant height was recorded from the treatment T₈ which was significantly higher over the other treatments at Gazipur and Jessore but at Jessore it was statistically identical to T_7,T₆and T₄ treatment. The highest number of branches per plant was recorded from the treatment T₈ at both Gazipur and Jessore. The lowest values were obtained from treatment T_1.The maximum number of pods per plant was recorded from the treatment T₈ at Gazipur and Jessore which was significantly different from the others treatments, but statistically identical to T₇at Jessore while it was lowest in T₁ treatment. The number of seeds per pod showed significant variation due to different treatments. The highest number of seeds per pod was observed in T₈ followed by T₅ and the lowest value in T₁treatment. Like other yield contributing parameters, the highest 1000 seed weight was also recorded in the treatment T₈ followed by T₅ only in Gazipur and the lowest 1000 seed weight was recorded in the control treatment. The seed yield of lentil was influenced significantly by the different micronutrient management practices during the period from 2016-17 at Gazipur and Jessore. The highest seed yield was found in the treatment T_8.This was significantly higher than the other treatments, except the treatment T₇ in Jessore which was statistically identical at per T₇. The lowest yield was recorded from T₁ treatment. In the case of stover yield of lentil showed also highest in T₈ treatment which was significantly different over the other treatments but statistically identical to T₇, T₆ and T₅ in both locations. The lowest stover yield was also recorded from T₁ treatment. From the three years study, different micronutrient management practices contributed positively and significantly influenced to increase the yields of lentil in both Gazipur and Jessore of Bangladesh. The highest significant yield increased of lentil in T₈ treatment in every year at both locations except in the first year at Gazipur where the highest yield increase was found in T₅ treatment. The three years average yields due to different micronutrient treatment ranged from 824-1236 kg ha^-1 at Gazipur and 1253-1807 kg ha^-1at Jessore. Comparison of the mean seed yield of lentil due to different micronutrient treatments between Gazipur and Jessore. The yield of lentil at Gazipur was observed lower than that of Jessore yield. This yield variation might be associated with the edaphic factor and pest infestation. The Gazipur soil brings low pH and lowers organic matter than Jessore because of the soil of Jessore under calcareous soil. The calcareous soils consist of high CaCO₃. On the other hand, footrot disease infestation at Gazipur has occurred. Nodulation of lentil on different dates was influenced significantly due to different micronutrient treatments during the Rabi season of 2016-17. In 32 days after sowing, the numbers of nodules per plant varied from 7.78-11.5 at Gazipur and 40.4-54.0 at Jessore, in 47 DAS, ranged from 19.4-29.5 at Gazipur and 116-156 at Jessore, in 62 DAS, ranged from 25.3-38.4 at Gazipur and 138-181 at Jessore and in 77 DAS, it was varied from 18.3-22.9 at Gazipur and 67.7-84.0 at Jessore, respectively (Table 3). The maximum numbers of nodules were recorded from the treatment T₈ in all the nodules collection dates which were significantly higher over the other treatment at Gazipur except nodule collection date 77 DAS it was highest in T₄ treatment at Jessore. In both the locations, the lowest nodule values were obtained from the control treatment which was significantly inferior to all other treatments. From the results of different dates, nodule formations were less in 32 DAS and in 77 DAS but, the formation was maximum between the date of 47 and 62 DAS in both the locations. It seems that the formation of the maximum nodule was occurred during early to mid flowering. After flowering, nodule efficiency might be reduced and began shutting down. Soil samples were collected from each treated plot for analyzing different soil properties viz. soil pH, organic matter, total N and available P, K, S, Ca, Mg, Zn and B. Initially, the soil pH was 6.6 at Gazipur and 8.2 was at Jessore, but after the completion of experiments, the soil pH remained unchanged although minor variation existed. A minor change in soil fertility occurred from the initial status due to different micronutrient management practices. The combined application of Zn, B and Mo (T₈) tended to maintain the initial fertility or increased slightly. Potassium (K), S and Mg slightly decreased in all plots over the initial status. The available Zn and B content of the soil slightly decreased when they were not applied, but remained almost static or increase when applied. Regarding the cost and return analysis, the highest net return TK. 64520 ha^-1 at Gazipur and Tk. 101960 ha^-1was obtained from the treatment T₈at Jessore. The highest benefit-cost ratio 2.86 and 3.83 were recorded from the treatment T₅ at Gazipur and Jessore, respectively. The lowest net return was calculated from control (T₁) treatment at both the location and the lowest benefit-cost ratio was counted from the control treatment at Gazipur and Jessore

Knowledge Management: Report/Proceedings