Interaction effect between mineral zinc-nitrogen fertilization mixture and organic fertilization as compost on yield, nutrients uptake of rice and some soil properties

To study the effect of organic fertilization as compost (20 m3 fed-1), mineral Zinc-Nitrogen fertilization mixture (three Zinc levels (0, 8 and 16 kg Zn fed-1) and three nitrogen rates (0, 30 and 60 kg N fed-1 were mixed alternately) on growth, grain and straw yields, N, P and K uptake for rice crop (Oryza sativa), variety Giza 178, two field trials at El-Serw Agricultural Research Station, Damietta governorate were conducted through summer seasons of 2015 and 2016. Plant height, dry matter, grain and straw yields also, N, P and K-uptake in grain and straw yields increased with increasing levels of zinc and nitrogen fertilization. Moreover, use organic fertilization as compost gave the highest values of the previous parameters. Applying of 16 kg Zn fed-1 + 60 kg N fed-1 with 20 m3 compost fed-1 gave the highest plant height, dry matter, grain and straw yields and N, P and K-uptake in grain and straw. Therefore, it preferably adds 16 kg Zn fed-1 + 60 kg N fed-1 with 20 m3 compost fed-1 to produce a high crop of rice under saline soil condition in North Delta. Concerning to soil properties after rice harvest, mixture 16 kg Zn fed-1 + 60 kg N fed-1 with 20 m3 compost fed-1 surpassed all other treatments in improving soil properties, since available NPK and organic matter content had increased while soil EC and pH in the root zone was decreased