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Cropping Pattern Based Micronutrient Application for Wheat-mungbean-t. Aman Crop Sequence Under Tista Meander Floodplain Soil at Rangpur

M. F. Islam
Principal Scientific Officer
Soil Science Division, Bangladesh Institute of Nuclear Agriculture (BINA), BAU Campus, Mymensingh-2202, Bangladesh;

M. R. Islam
Department of Soil Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. Jahiruddin
Department of Soil Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

T. Sarmin
Agronomy Division, Bangladesh Institute of Nuclear Agriculture (BINA), BAU Campus, Mymensingh-2202, Bangladesh;

Abstract/ Executive Summary:

Intensification of agricultural land use coupled with cultivation of modern varieties has remarkably increased in Bangladesh. This in turn has resulted in deterioration of soil fertility, with emergence of macro- and micro-nutrient deficiency of crops. With this point in view, a study was undertaken to evaluate the effect of different micronutrients on crops, and to determine the requirement of selected micronutrients for crops and cropping patterns in the Tista Meander Floodplain (AEZ 3). Crop experiments were conducted at BINA substation and farmers’ fields of Rangpur district within AEZ 3. In expt.-1, the field trials were done with six micronutrients (B, Zn, Cu, Mn, Fe & Mo) designed in an additive manner. These elements were imposed to the first crop and their residual effects were monitored on the next two crops over the patterns: wheat-mungbean-T. aman. The rates of micronutrient application were 3 kg Zn, 2 kg B, 2 kg Cu, 3 kg Mn, 5 kg Fe and 1 kg Mo per hectare, added as fertilizers such as ZnSO₄.7H₂O, H₃BO₃, CuSO₄.5H₂O, MnCl₂, FeSO₄.7H₂O and Na₂MoO₄, respectively. Other nutrients viz. N, P, K & S were applied at recommended rates to all plots; rationale was followed for the second and third crops. Intercultural operations were done whenever required. The results revealed that across the experimental sites, the crops were quite responsive to the added Zn and B. Positive effect of Cu was also noted in some cases. In the following year (expt. 2), two micronutrients, Zn and B were taken into the same cropping pattern and designed in a way to determine whether 1-crop, 2-crop or 3-crop application is necessary to achieve satisfactory crop yield. The rates of Zn application were 0, 2, 4 & 6 kg ha^-1, and the rates for B were 0, 1.5 and 3 kg ha^-1. The results show that Zn application at 4 kg ha^-1 coupled with B application at 1.5 kg ha^-1 to the first crop can meet their requirement for the subsequent two crops in a pattern. The present study suggests that cropping pattern based field trials with Zn, B and Cu need to be done at farm level in the high cropping intensity areas of this country in order to determine micronutrient requirement of crops.

Keywords: Cropping pattern, Tista Meander Floodplain, Micronutrient

Location: BINA substation and farmer's field, Rangpur

Start Date: 00-00-2011

End Date: 00-00-2013

Program Area: Farming System

Commodity: Cropping pattern

Objectives:

To evaluate the effect of micronutrients application on the yield of wheat, mungbean and T. aman rice crops and to find out the optimum rate of micronutrients for the wheat-mungbean-T. aman cropping pattern in AEZ 3.

Methodology:

Experiments on a dominant cropping pattern of wheat-mungbean-T. aman were set up at BINA substation and farmers’ fields at Rangpur Sadar in 2011-2012 (experiment 1 in two locations) and in 2012-13 (experiment 2) at Kaunia upazila under Rangpur district. The objectives were to evaluate the effects of different micronutrients on the crop yield and to see the direct and residual effects of Zn and B as to determine the requirement of Zn and B for the wheat-mungbean-T. aman cropping sequence. Experiment 1 with seven treatments was set up in November 2011 in two locations with wheat the first crop of the cropping pattern followed by mungbean as a legume (2nd crop) and T. aman rice (3rd crop). It continued up to October 2012 by T. aman rice harvest. Experiment 2 was started at Kaunia upazila under Rangpur district in November 2012 with wheat and completed by T. aman rice harvest. The details of experiments are given below: Treatments for experiment 1 and experiment 2: For the first year (expt. 1), the treatments were designed taking all micronutrients except Cl following additive element trial technique. The experiments (1 & 2) were laid out in a Randomized Complete Block Design (RCBD), with three replications. There were seven treatments (expt. 1) with six micronutrients, as follows: T1: Control (No use of micronutrients) T2: Zn T3: Zn + B T4: Zn + B + Cu T5: Zn + B + Cu + Mn T6: Zn + B + Cu + Mn + Fe T7: Zn + B + Cu + Mn + Fe + Mo These micronutrient treatments were imposed on the first crop only (Expt. 1). Their residual effects were observed on the next two crops over the year. The rates of micronutrients were 3 kg Zn, 2 kg B, 2 kg Cu, 3 kg Mn, 5 kg Fe and 1 kg Mo per hectare. The elements were added as ZnSO4.7H2O (23% Zn), H3BO3 (17% B), CuSO4.5H2O (25% Cu), MnCl2 (17% Mn), FeSO4.7H2O (19% Fe) and Na2MoO4 (39% Mo), respectively. Other nutrients viz. N, P, K & S were used at recommended rates for all plots (for wheat 100-20-60-10, mungbean 20-15-25-8 and T. aman 90-15-40-10 kg ha–1 N-P-K-S, respectively from Urea, TSP, MoP and Gypsum); rationale was followed for the second and third crop within a year. For the wheat, one-third urea was applied at final land preparation and the rest was applied at an equal rate during tillering and booting stages. For the rice, the one-third urea was applied after seven days of transplanting and the rest at an equal rate during the maximum tillering and panicle initiation stages. For mungbean, the one-third urea was added before sowing, another one-third after 25 days of sowing and the rest urea after 50 days of sowing. The experiment 1 was conducted at BINA substation farm and in a farmers’ field both at Rangpur. The experiment 2 was conducted at Kaunia, Rangpur in a farmers’ plot. Before conducting field experiments soil samples were collected and analyzed. The soil properties are presented in Table 1. Data on grain and straw/stover yield of crops were recorded and analyzed statistically following Duncan’s New Multiple Range Test (DMRT).

Source of Information: J Bangladesh Agril Univ 15(2): 140–147, 2017

Article Link (Online Journal): doi: 10.3329/jbau.v15i2.35055

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Zn application at 4 kg ha–1 coupled with B application at 1.5 kg ha–1 to the first crop can meet their requirement for the subsequent two crops in a cropping pattern.

Knowledge Management: Journal