Response of cauliflower plants to phosphorus, rates and sources of fertilization [electronic resource].

Includes references.

Two field experiments on cauliflower (Brassica oleraceae L. var. botrytis) cv. "Snowball" were carried out in the Experimental Farm of the Faculty of Agriculture, Moshtohor, Zagazig University during the winter seasons of 1997/1998 and 1998/1999. cauliflower plants were fertilized with P at 2 levels, 30 and 60 kg P205 and 5 levels of phosphorus sources (SP, GSP, DAP, MAP and TSP) plus the control treatment. Concerning the main effect of P levels, results revealed that 60 kg P2O5/fed increased the vegetative growth, also, N, P and K contents of cauliflower of leaves and curds behaved similarly. Therefore, total and marketable yields gave the highest mean values of plants fertilized with 60 kg P2O5/fed. Regarding the main effect of P- sources,results declared that either MAP or DAP increased most of studied characters. However, the vegetative growth, also, N, P and K contents of cauliflower of leaves and curd as well as total and marketable yields were at their highest values in plant fertilized with 60 kg P2O5/fad from SP, MAP or TSP and DAP at 30 kg P2O5/fad. Abbreviations: Sp; calcium super phosphate (15.5% P2O5), GSP; granulated super phosphate (15.5% P2O5), MAP; monoammonium phosphate (45% P2O5 + 11% N), DAP; diammonium phosphate (41% P2O5 + 16% N), TSP; triple super phosphate (37.5% P2O5).

Summary in Arabic.

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