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Effect of Conservation Tillage and Phosphorus on the Productivity of Gardenpea-maize-t.aman Rice Cropping Pattern and Soil Physico-chemical Properties (2019–2020)

M.J. Alam
Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

M. K. Alam
Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

A.T.M.A.I. Mondol
Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

S. Akhter
Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

Abstract/ Executive Summary:

Field experiments on Garden pea- Maize-T.aman rice cropping pattern were conducted in Grey Terrace soil of Joydebpur under AEZ-28 during rabi 2018-2019and 2019 to 2020 to observe the effect of tillage practices and phosphorus on soil properties and to increase the productivity of the cropping system. There were 2 types of tillage as Strip tillage (ST) and conventional tillage (CT). In addition, 3 types of application of phosphorus such as granular dose (basal) (P₁), powder doses (P₂) and granular doses (split) (P₃) in a split-plot RCB design with 6 treatments and 3 replications. Strip tillage gave more yield than conventional tillage for pea (p≤0.05) vice-versa for T. aman rice(p≥0.05) due to the residual nutrient uptake factor for the subsequent crop. Powder dose (basal) significantly performed the best than other phosphorus doses for garden pea but split doses gave more yield than other doses for T. aman. Strip tillage with phosphorus combinations comparatively gave more moisture than conventional tillage with phosphorus combinations and vice-versa for penetration resistance. pH, OM, N, S, Zn and B increased but P and K content more or less remain unchanged compared to the initial soil. The 6^thcrop T. aman rice is going on with tillering growth.

Keywords: Phosphorus, Soil properties, Soil physico-chemical properties, Gardenpea

Location: Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh

Start Date: 00-00-2018

End Date: 00-00-2020

Program Area: Farming System

Commodity: Physico-Chemical, Cropping pattern

Objectives:

The present study was taken to settle the following objectives: To find out the effect of tillage practices and phosphorus on soil properties and to increase the productivity of the cropping system.

Methodology:

The tillage operations such as strip tillage with VMP (versatile multi-crop Planter) and conventional tillage with power tiller were employed in combination with three split applications of phosphorus Viz. P₁ (All basal dose as a granular form), P₂(All basal dose as powder form) and P₃ (80% basal and 20% at 20 DAS as a granular form). Thus 6 treatment combinations were arranged in a split-plot design with three replications. The plot size was 4.8 M× 2.4 M. The tested varieties were BRRI dhan57 and BARI Motorshuti-1 for T.amn and Garden pea, respectively. The crops were fertilized with soil test-based (STB) fertilizer dose as per FRG-2018 (BARC, 2018). The fertilizer doses of were N₅₄ P₁₅ K₂₉ S₈Zn_1.3B_0.3kg ha^-1 and N₁₀₂ P₅ K₅₄ S₁₀Zn_2.0 kg ha^-1for garden pea and T. aman, respectively. G. pea was sown on 15 December 2019 and crop harvested on 12 March 2020. T.aman seedling was transplanted on 30 July 2019 and crop harvested on 04 November 2019. For garden pea, all, MoP, gypsum and Zinc sulphate and boric acid were applied during final land preparation. Urea was applied in three equal splits at the seedling establishment stage (7 Days after emergence), and the rest amount was applied 30 DAS and 45 DAS. 100 %TSP was applied as granular form (P₁) and as powder form (P₂) and 80% as granular form (P₃) during final land preparation. Rest 20 % TSP for P₃ as the granular form was applied 20 DAS. For T.aman all MoP, gypsum, zinc sulphate were applied during final land preparation. Urea was applied in three equal splits at 7 DAT, 25 DAT and 40DAT. 100 %TSP was applied as granular form (P₁) and as powder form (P₂) and 80% as granular form (P₃) during final land preparation. Rest 20 % TSP for P₃ as the granular form was applied 20 DAT). For T.aman, two irrigations were applied in the dry conditions. For Garden pea, every split application of fertilizers was followed by irrigation. Another supplemental irrigation was applied at 10 DAS, while other intercultural operations were done as and when necessary. The collected soil samples were dried at room temperature mixed thoroughly, grinded, sieved with a 2 mm sieve and preserved in plastic containers for subsequent laboratory analysis. Soil samples were then analyzed for SOM, total N and P. The SOM was determined by wet oxidation (Jackson 1973), total N by a modified Kjeldahl method (page et al. 1989) and total P by using the SnCl₂ reduction method (Black, 1965).pH was determined through glass electrode pH meter method (Jackson 1962), K and S were determined through NH₄OAC method (Hanlon and Johnson,1984)and turbidimetric method (Sperber, 1984), respectively. Micronutrients were analyzed using atomic absorption spectrophotometer. The particle size distribution of the initial soil was analyzed by the hydrometer method (Black, 1965) and the textural class was determined using the USDA texture triangle. The Bulk density of the soil samples was determined by the core sampler and pycnometer method (Karim et al., 1988). Moisture content was determined by the gravimetric method (Black, 1965). Field capacity was done through the pressure plate method.

Source of Information: Annual Research Report 2019–2020, Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Strip tillage gave better yield than conventional tillage for garden pea but vice-versa for T. aman due to residual nutrient factor for the subsequent crop. Powder dose gave the best pod yield for the garden than other doses for both crops while split doses gave the best yield for T. aman rice. Strip tillage with phosphorus combinations comparatively gave more moisture than conventional tillage with phosphorus combinations and vice-versa for penetration resistance. pH, OM, N, S, Zn and B increased but P and K content more or less remained unchanged compare to the initial soil. The 6^thcrop T. aman rice is going on with tillering growth.

Knowledge Management: Report/Proceedings