Effect of the type of organic fertilizer and spraying with boron on the growth and yield of BRASSICA OLERACEA in gypsum soil

الملخص

      A global field experiment was conducted in the fields of the College of Agriculture, University of Tikrit, for the winter agricultural season (2022-2023) to study the effect of fertilization with three sources of organic fertilizer (sheep waste, sheep waste, cow waste), in addition to the comparison treatment and spraying with boron at two levels, in addition to the comparison treatment (50, 100) mg L^-1 and the interaction between them in growth and lizard yield according to a randomized complete block design (RCBD) with twelve treatments and three replications. The results showed the following:

1. 1. Organic fertilizer had a significant effect on all growth and yield traits compared to the comparison treatment, and poultry waste recorded a significant superiority in all the studied traits compared to sheep and cow waste, with an average of (44.00) cm, (641) cm² leaf ^-1, (55.80) SPAD, and (5936) ) kg ha^-1 for plant height, leaf area, chlorophyll content, and total marketable yield.
2. 2. Growth characteristics and quantitative and qualitative yield characteristics were improved by increasing the addition of boron, as the spraying level (100) mg L-1 gave superiority in plant height, leaf area, chlorophyll content, and total marketable yield, with an average of (42.68) cm² and (612) cm² leaf^-1. And (52.96) SPAD and (5936) kg ha^-1, respectively.
3. The interference factor (poultry waste + 100 mg B L-1) was superior to the other interference factors, with an average of (47.62) cm, (692) cm² leaf^-1, (57.83) SPAD, and (6560) kg ha^-1 for plant height and area. leaves, chlorophyll content and total marketable yield.

Keywords: type of organic fertilizer, spraying with boron, BRASSICA OLERACEA, gypsum soil