The Role of organic and, mineral fertilizers in mitigation of the negative effects of saline water on soil properties, availability and contents of N.P.K. and yield in cabbage (Brassica oleracea var. capitata L)

A field experiment was conducted during the agriculture season (2014 -2015) In Horticulture station of the Ministry of Agriculture in Mahaweel which located 20 km north of Babylon city in sandy clay loam soil , usinga randomized complete block design (RCBD) with Systematic Arrangement of Whole – plots , to study the Effect of irrigation water quality and organic and mineral fertilization on the availability of some nutrient elements and cabbage yield , The experiment included 72 Treatment caused by the interaction between the two factors , The first factor represents the salinity of irrigation water (W) at three levels (1.4, 3 , 6 ds m-1 ) The second factor represents the organic and mineral fertilization (T) with eight in fertilizer transactions which are ( Control ) , (Composting corn cobs 20 tons h-1) , (Composting Cattle 20 tons h-1) , (Composting corn cobs+ composting cattles 20 tons h-1 ratio of 1: 1) , (Chemical fertilization) , (Composting corn cobs 20 tons h-1 + Chemical fertilization) , (composting cattles 20 tons h-1 + Chemical fertilization ) , ((Composting corn cobs + composting cattles 20 tons h-1 rate of 1: 1) + Chemical fertilization) ) . with three replicates . The results of the study Summarized as follow : The raised of water salinity levels led to significantly raise the values of electrical conductivity of the soil and nutrient elements availability (N, P and K) in the soil and A slight decrease in the PH and cabbage yield . While adding organic fertilizer led to a significant decrease in the electrical conductivity of the soil and PH, Also led to a significant increase in the nutrient elements availability (N, P and K) in the soil and cabbage yield. Mixing compost + Chemical fertilizers has led to a significant increase in available N and P in the soil, and yield compared with the addition of each of them individually. The mixing treatment ((Composting corn cobs + composting cattle s 20 tons h-1 rate of 1: 1) + Chemical fertilizers)) outperformed on other treatments to give the highest yield values reflected significantly on the product of cabbage (60.92 ton h-1 ),There was a significant decline in the leaves contents of Nutrient (N, P, and K) , the ratio of Potassium to Sodium dry weight of leaves, chlorophyll content in leaves rising of irrigation water salinity, However all the previously mention characteristics were significant raised with addition of organic and chemical fertilizers whether alone or as mixture, the mixed treatments gave the higher averages in all of the pervious characteristics.

کلیدواژه ها:

Cabbage ، Salt stress ، Saline water ، Organic fertilizers ، Mineral fertilizers