USING OF BIO AND ORGANIC FERTILIZATION TO REDUCE MINERAL NITROGEN FERTILIZER AND IMPROVE SAKHA 108 RICE CULTIVAR PRODUCTIVITY

Abstract

Two field experiments were conducted at the experimental farm of Sakha Agricultur e R esearch Station, S akha, Kafr El -Sh eikh, Egypt during 2017 and 2018 seasons. The aim of th e current investigation was to study the effective of bio and organic fertilizer s in declining the mineral nitrogen fertilizer in rice fields ( Sakha 108 c v.) . The treatments were: T 1 : 165 kg N/ha as recommended nitrogen rate (R N), T 2 : ⅔ RN, T 3 : ⅔ R N + 5 t/ha poultry manure as organic fertilizer, T 4 : ⅔ RN + Anab aena or yza e (N – fixing anabaena) as bio -fertilizer , T 5 : ⅔ RN + organic manure + bio -fertilizer, T 6 : ⅓ R N, T 7 : ⅓ RN + organic manure , T 8 : ⅓ RN + bio -fertilizer and T 9 : ⅓ RN + org anic manure + bio -fertilizer. The obtained results revealed that the integration among mineral, organic and bio - fertilization of T 5 (110kg N/ha + 5 t/ha poultry manure + 600 g/ha N -fixing anab aena) gave the maximum values of tillers number m -2 , days to hea ding, dry matter accumulation, flag leaf chlorophyll content, flag leaf area, leaf area index, panicles number m -2 , panicle weight, 100- grain weight, grain yield, straw yield, milling percentage and grain protein content, as well as, the lowest number of u nfilled grains panicles -1 . However, the differences between T 5 and T 1 (165 kg N/ha as recommended mineral N level) in panicles number m -2 , number of unfilled grains per panicle, straw yield , milling percentage and grain protein content were insignificant. In addition, T 1 gave the tallest plants and the maximum values of number of filled grains per panicle and hulling percentage, but the differences with T 5 in number of filled grains panicle -1 and hulling percentage were insignificant. Number of branches pan icle -1 , panicle length, harvest index and head rice had insignificant response . It could sum up that adding ⅔ of the recommended mineral nitrogen plus of 5 t/ha of poultry manure plus 6 00 g/ha of N-fixing anab aena could be the recommended for reducing min eral nitrogen fertilizer and brining high grain yield of Sakha 108 rice variety.