Reacting of multifarious nitrogen fertilizer resorces on the yield traits of , Zaghloul cv. date palm and the calcareous soil fertlity
2010
El-Assar, A.M. | El-Kouny, H.M.
The interaction among their levels was represented as field experimental treatments. Data were obtained and statistically analyzed in the end of the both seasons for yield and fruits characteristics and in the end second season for soil properties. The results cleared that the studied yield traits; most fruit physical and chemical characteristics except fruit diameter in two study seasons and soluble tannin percentage in the 1. t season were statistically affected; likewise, most of soil properties except soil acidity (soil pH) were statistically affected by bath experimental factors and the interaction among their levels. The mineral fertilizer type (a1) level leads to the significant highest palm yield, bunch weight, fruit weight and longest fruit length. On the other side, organic fertilizer types (a2), (a3) and (a4) levels lead to the significant highest values of dry matter percentage , TSS percentage, total sugars percentage and total protein percentage; beside the significant lowest values of fruit juice acidity percentage were obtained in two study seasons. And the lowest significant value of soluble tannins percentage in the 2. d season . Concerning the soil properties, the organic fertilizer type (a4) level leads to the significant highest values of soil total nitrogen (T-N), available phosphorus (Av-P), organic matter (OM), soil cation exchangeable capacity (CEC) and soil bulk density(Db). Field addition rate 1000 g N/ palm/ year (B3) level leads to the significant highest of T-N, Av-P, OM, CEC, and Db. Field application treatment (a4b3) leads to the significant highest and best value of T- N, Av- P, OM and Db. On the other hand, the (a5b2) leads to the significant best value of soil CEC in the end of second season.
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