INTEGRATED EFFECT OF ORCANLC MANURES AND NITROGEN ON YIELD CONTRIBUTING CHARACTERS AND YIELD 'kc4 OF RICE (BRRI dhan29)

Abstract

The experiment was conducted in the Farm of Sher-c-Bangla Agricultural University, Dhaka, Bangladesh during the period from January to April 2010 to study the integrated effect of organic manures and nitrogen on yield contributing characters and yield of rice (BRRI dhan29). The experiment consisted of 12 treatments. The treatments were T 1 : Control condition (No chemical fertilizer, no organic manure); 'l': 100% recommended N (120 kg N ha 4 ) + recommended P. K, S and Zn); 1' 3 : 100 kg N from urea + 20 kg N substituted by vermicompost (VC) + F, K, S and Zn; T4 : 100 kg N from urea + 20 kg N substituted by cowdung (CD) + P, K, S and Zn; T 5 : 80 kg N from urea + 40 kg N substituted by VC + V. K, S and Zn; T6 : 80 kg N from urea + 40 kg N substituted by CD + P, K, S and Zn; T7 : 60 kg N from urea + 60 kg N substituted by VC + P, K, S and Zn; i' s : 60 kg N from urea + 60 kg N substituted by CD + P. K, S and Zn; T 9 : 100 kg N from urea + 20 kg N substituted equally by VC and CD + P, K, S and Zn; T, 0 : 80 kg N from urea + 40 kg N substituted equally by VC and Cl) + P. K, S and Zn; T 11 : 60 kg N from urea + 60 kg N substituted equally by VC and CD + P. K, S and Zn and T 17 : 120 kg N substituted equally by VC and CD. Data on different growth parameter & yield, nutrient content in grain & straw, nutrient uptake by grain & straw and characteristics of post harvest soil was recorded. At 30, 50, 70, 90 DAT and harvest, the longest plant (23.96 cm, 31.29 cm., 44.23 cm, 66.84cm and 88.87 cm) was recorded from T 10 and at the same DAT the shortest plant (16.47 cm, 21.60 cm, 30.23 cm, 47.13 cm and 61.95 cm) was observed from T 1 as control condition. The highest grain yield (6.73 t hi) was recorded from T 10, while the lowest (2.16 t ha 4 ) from T,. The hirest straw yield (7.10 t hi') was obtained from T 10 and the lowest (4.33 t hi) from T,. The highest N uptake by grain (43.99 kg hi') was recorded from T 11 and the lowest (16.38 kg hi ) from T,. The highest P uptake by grain (14.63 kg hi') was observed from T 11 , while the lowest (6.32 kg hi') from T,. The highest K uptake by grain (19.66 kg hi) was found from T,,, whereas the lowest (7.72 kg hi1 ) was observed from T,. The highest N uptake by straw (30.87 kg hi') was recorded from 1' 6 and the lowest (21.85 kg hi') from T,. The highest P uptake by straw (4.72 kg hi') was found from T 4, whereas the lowest (3.77 kg hi') from T,. The highest K uptake by straw (73.98 kg hi') was recorded from i'6 and the lowest (50.76 kg hi) from T,. Applications of 80 kg N from urea +40 kg N substituted equally by VC and CD + P. K, S and Zn was the superior among the other treatments in consideration of yield contributing characters and yield of BRRI dhan29.