تأثيرالتسميد الورقي بالفسفوروالبوتاسيوم في الحاصل وبعض مكونات محصول الـــــــــرز

Abstract

To study the best combination of foliar fertilizers application P and K on yield and some yield components of rice cv .Anbar -33 . Field experiment was conducted at the farmer's field in Mishkhab , during 2001and 2002 seasons. The design of the experiment was according to RCBD with 3 replications.There were17 treatments, one of these was the check treatment (soil application ) was a combination of 160) N50 + P+120 K ) Kg .ha-1 and the other 16 treatments was applied as foliar treatments as well as added 1/4 the check treatment P and K quantities with 160 N. Kg. ha-1 to the all foliar treatments in which there were four levels of P( 0 , 7.5 , 12.5 , 17.5) kg P.ha-1 and K ( 0 , 10 , 15 , 20 ) kg K/ha. The results showed that the suitable P- foliar fertilization treatment was 12.5 kg P.ha-1 (P2) which caused significant differences in biological rice yield and grain yield of the two seasons .The mean increased to about 18.0 and 10.3% for biological rice yield and and 23.9 and 14.6 % for grain yield compared with the water foliar (P0 ) and P1 (7.5) kg P. ha-1- respectively.Using K - foliar fertilization treatment (K3 ) caused significant differences in biological yield ,and grain yield the mean increased 21.6 and 12.3 % for biological yield and grain yield 22.5 and 12.6 %compared to the water foliar (K 0) and 10 Kg K.ha-1- (K1) respectively ,and no significant differences recorded between K2 and K3 treatments in two characteristics . The results showed that the application of (12.5P+20K) kg.ha-1 gave the highest mean for biological yield 11336 Kg/ha and rice grains yield 3228 Kg/ha , with season 2001 and the application of (17.5 P + 15K ) kg.ha-1 gave biological yield 12286 Kg/ha and rice grains yield 3926 Kg/ha , for season 2002. As well as the mean No. of panicles 222.6 and No. of grains 147.3 compared with the other foliar treatment. While no significant differences recorded in the other plant traits ,there was treatment also had increased effects compared with the soil application treatment.