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Effect of Intensive Fertilization and Manuring on Some Chemical Properties of Soil

M. J. Abedin Mian
Department of Soil Science, Bangladesh Agricul tural University, Mymensingh.

M. Eaqub
Department of Soil Science, Bangladesh Agricul tural University, Mymensingh.

Abstract/ Executive Summary:

A field experiment was conducted from Aus season of 1976 to T. aman season of 1977 for 2 cycles of an Aus-T, Aman- Pulse crop sequence in a typical rice growing alluvial soil of Bangladesh Agricultural University Farm at Mymensingh to see the effects of intensive fertilization and manuring on some chemical properties of soil. There were 10 treatments viz.O, N, P, K, NP. NK, PK, NPK, FYM and GM (green manure). Dhaincha was grown as green manuring crop instead of aus. Results show that N, P and K alone and in combination had no effect on soil pH but FYM and GM slightly decreased the pH value. Organic C increased due to NP, NPK, FYM and GM and decreased due to N, P, K, NK and PK. The influence of treatments on NH,-N and NOa-N was found to be favourable. The status of available P increased due to P and P- containing treatments and decreased due to treatments in which P was not included. FYM and GM had beneficial effect on available P. Exchangeable K + status in soil enhanced due to K, FYM and OM but lowered due to N, P and NP treatments.

Keywords: Effect, Fertilization and manuring, Soil

Location: Bangladesh Agricultural University, Mymensingh.

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Soil fertility

Objectives:

To see the effects of intensive fertilization and manuring on some chemical properties of soil.

Methodology:

A field experiment was carried out from aus season of 1976 to pulse season of 1977 of an Aus- T. aman-pulse- crop sequence in dark-grey noncalcareous flood plain soil of Brahmaputra alluvium. The initial soil was neutral in reaction (pH 7.0) and contained- 0.60% organic C, 10.4 mg/100 gm NH4 -N, 8.4 mg/100 gm NOs -N, 11 ppm available P and 0.10 me/lOO gm exchangeable K +. Texturally the soi] was silt loam (2.1% coarse sand, 37.2~. fine sand, 43.6% silt and 15.8% clay). There were 10 treatments viz, 0, N, P K, NP, NK, PK, NPK, FYM and OM (green manure) replicating 3 times.making a total of 30 plots Aus
( Local), T. aman ( LIV) and pulse( Kheshari) were used as test crops.The fertilizer doses Were 66 kg N/ha from Urea, 22 kg P/ha from T. S. P., 18kg K/ba from Muriate of Potash and 16tons FYM/ha from rotten cow-dung.Experimental design a dopted was randomized block.Dhaincha was grown as green manuring crop instead of aus. Kheshari received no fertilizer as it was sown in standing aman crop. P and K fertilizers and FYM were applied to the plots following the conventional methods before sowing of aus seeds and transplantation of T. aman at the time of final preparation of land. N was applied in three splits (~ before sowing!transplanting, i at maximum tillering stage and i at pre booting stage ).Soil samples at a depth of 0·15 emwere collected from the plot before fertilizer application for initial soil characteristics and after harvesting of crops from several spots of individual plots excepting the T. aman where soil sample were collected after harvesting the pulse. The soils were taken to the laboratory, dried , ground,sieved through 0.2 mm sieve. Finally the soil samples of 3 replicating plots of each treatment were mixed properly.

Source of Information: Bangladesh J. Agril. Sc. 8(2): 165•173 : 1981 ISSN 0379-4296

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Results show that N, P and K alone and in combination had no effect on soil pH

Knowledge Management: Journal