Integrated use of raintree leaves with urea on BRRI dhan 41 rice
International Journal of Natural and Social Sciences
A field Experiment was carried out at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during the aman season of 2008 to study the effect of integrated use of raintree (Albizia saman) leaves with urea on BRRI dhan 41 rice. The experiment was laid out in a randomized complete block design with seven treatments and three replications. The treatments were; T 1 : Control, T 2 : Recommended Fertilizer Dose (RFD), T 3 : 80% Recommended Dose of Nitrogen (RDN) from
... rogen (RDN) from urea + 20% RDN from raintree leaves, T 4 : 60% RDN from urea + 40% RDN from raintree leaves, T 5 : 40% RDN from urea + 60% RDN from raintree leaves, T 6 : 20% RDN from urea + 80% RDN from raintree leaves and T 7 : 100% RDN from raintree leaves. The raintree leaves were applied 10 days before transplanting of rice seedlings. The recommended doses of chemical fertilizers applied were 80 kg N, 15 kg P, 50 kg K, 12 kg S and 2 kg Zn ha-1. N, P, K, S and Zn were applied as urea, TSP, MoP, Gypsum and ZnO respectively. Yield contributing characters of BRRI dhan 41 like plant height, number of tillers hill-1 , panicle length, number of grains panicle-1 and 1000-grain weight were significantly influenced by the treatments. The results of the study indicated that most of the yield contributing characters was the maximum in treatment having 60% RDN from urea + 40% RDN from raintree leaves. The grain and straw yields of BRRI dhan 41 were also significantly influenced by the treatments. The maximum grain yield of 5.04 t ha-1 was observed in treatment T 4 (60% RDN from urea + 40% RDN from raintree leaves) and the minimum of 3.64 t ha-1 was in treatment T 1 (control). Nitrogen contents in BRRI dhan 41 rice and its uptake were significantly increased by the treatments. The results indicated that the use of 60% RDN from urea and 40% RDN from raintree leaves had a better performance on the nitrogen content, nitrogen uptake and yields of BRRI dhan 41 rice.