EFFECT OF LOW FERTILIZER APPLICATION ON YIELD OF WHEAT CULTIVARS OF BANGLADESH

Abstract

A field experiment was conducted at the research field Department of Soil Science, Faculty of Agriculture, Hajee Mohammed Danesh Science and Technology University, Dinajpur, Bangladesh during the period from December 6, 2013 to April 4, 2014. The experiment was conducted to find out the “effect of low fertilizer application on yield of wheat cultivars of Bangladesh”. The treatment used for the experiments consist of eleven modern wheat verities viz. with eleven types of practices and to evaluate the suitability of wheat cultivation with inorganic fertilizer application. The experiment was laid out following Randomized Complete Block Design (RCBD) with three replications. The treatment of the experiment involve were T1 (Control); T2 (25% of the recommended dose of fertilizer) ;T3 (50% of the recommended dose of fertilizer); T4 (75% of the recommended dose of fertilizer); T5 (100% of the recommended dose of fertilizer) and the variety which involve in the experiment V1 =BARI gom-25, V2 =BARI Gom-27, V3 =BARI Gom-28, V4 =Sawrna, V5 =Kanchon, V6 =Bijoy, V7 =Protiva, V8 =Sonalika , V9 =Kalyanson, V10 =Kheri, V11= Durum. In case of growth parameter better result show in the T1 treatment i.e 0% of the recommended dose of fertilizer and BARI Gom-25,BARI Gom 27,BARI Gom-28,Sawrna, Kanchon, Bijoy, Protiva, Sonalika, Kalyanson, Kheri,Durum, shows good result than other varieties.The highest post harvest soil N(0.8%) was found in the treatment T5, Where BARI-gom -25was grown. Similarly 0.7% Nitogen recorded in soil of T5 Treatment With BARI gom-28 T5, Sawrna (0.06%) in T4 and T5, Kanchon (0.07%) in T4 and T5,Bijoy (0.07%) in T4, Protiva (0.07%) in T5, Sonalika (0.06%) in T4, Kalyason (0.06%) T5, Kheri (0.07%) T3,Durum (0.07%) in T5. In case of phosphorous BARI gom-25 variety maximum phosphorus content (35.1 µg/gm) in T4.BARI gom-27 (40 µg/gm) in T5, BARI gom-28 (41.5 µg/gm) in T5,Sawrna(35.1 µg/gm) in T4.Kanchon (45 µg/gm) in T5.Bijoy (40.5 µg/gm) in T5, Protiva (44.9 µg/gm) in T5,Sonalika (40.1 µg/gm) in T5,kalyanson (45 µg/gm) in T4.Kheri ((40 µg/gm) in T5,Durum (42.06µg µg/gm) in T5. Results revealed that the variety Protiva produced the highest grain yield (3.65t ha - 1 ) and straw (5.28 t ha -1 ) yield, biological yield (8.93 t ha -1 ) and higher harvest index (40. 40%) due to production of Plant Height, Panicle length Effective Tillers Plant, Non-effective Tillers Plant , ,No. of fertile Spikeletes Spike,No. of grain spike, and 1000 grain weight(g). The higher percentage of wheat production was obtained by the variety Protiva. The treatment T5 (0% fertilizers) produced the higher grain yield (3.65 t/ ha) and straw yield (5.28 t ha -1 ).From the above discussion it was clear that application of chemical fertilizers as 0% of the recommended doses for wheat cultivation increases the yield of Protiva variety. Other varieties of wheat shows maximum yield with the application of chemical fertilizers as 100% of the recommended doses for wheat cultivation increases the yield of wheat. NPKS content in the soil was maximum with application of chemical fertilizers as 75%& 100% of the recommended doses for wheat cultivation.