| Popis: |
A field trial was conducted through successive the two summer growing seasons 2018 and 2019 at Sakha Agricultural Research Station Farm, Kafr-El-Sheikh Governorate. The objective of this current study was to investigate the impact of three land leveling levels and three irrigation treatments on some water relationships, cotton yield and also some its components. The experiments were designed as split plot with three replications. The main plots were occupied by land leveling with three levels namely; traditional leveling farmers practices (L1), Dead level (0.0%) slope (L2) and 0.10% ground surface slope (L3). while sub plots were devoted t cut-off irrigation with three level namely, cut-off at 100% of furrow length (I1),cut-off irrigation at 90% of furrow length (I2) and cut-off irrigation at 80% furrow length(I3). The main results can be summarized as follows: Land leveling and cut-off irrigation treatments have highly significant effect on increasing the cotton yield. its components and fiber technological properties. The interaction between the two factors resulted in the highest values of cotton yield i.e. The highest mean values of seed cotton yield, boll weight, leaf area, plant height, lint percentage, lint index and seed index were obtained under I3 and L3 The highest mean values of fiber fineness, fiber strength, length 2.5%, length 50% and uniformity index were obtained from interaction between I3 and L3 . Cut-off irrigation at 80% from furrow length (I3) and 0.1%ground surface slope ( L3) decreased seasonal applied water, water consumptive use and water stored in the effective root zone by 20.11, 12.11 and 10.90%, respectively compared with cut-off irrigation at 100% of furrow length ( I1) and L1 (traditional land leveling). Also, the highest mean values of water application efficiency, water consumptive use efficiency (71.65, 67.84%) respectively were obtained with I3 and L3 treatments. The highest mean values of water productivity (WP) and productivity of irrigation water (PIW) were recorded under the I3 and L3. |
