Two field experiments were conducted at Sakha Agricultural Research Station, Kafr El-Sheikh Governorate. The site is located at 31 0 07ˉ N Latitude and 30 0 57ˉ E longitude with an elevation of about 6 meters above mean sea level. This location represents the conditions of the North Middle Nile Delta region during the two successive winter growing seasons 2012/2013 and 2013/2014 to investigate the effect of irrigation intervals and plant densities on faba bean yield, some yield attributes and some water relations under drip irrigation system. Faba bean (Vicia faba L.) seeds, variety Sakha 2, were planted on 10 th and 15 th November and harvested on 28 th April and 2 nd May in the first and second growing seasons, respectively. A split plot design with four replicates was used. The main plots were randomly assigned by (irrigation intervals, I) which were I1 (irrigation every 6 days), I2 (irrigation every 9 days), I3 (irrigation every12 days), I4 (irrigation every15 days), I5 (irrigation every18days). The sub-main treatments were also randomly assigned by (plant densities, D) which were, D1 (planting one plant on one lateral from each side adjusted with opening the emitter), D2 (planting two plants on one lateral from one side adjusted with the emitter), D3 (planting four plants on one lateral on the two sides of the emitter), two plants from each side and D4 (planting four plants on one lateral on the two sides of the emitter, two plants from each side). In addition, two plants were planted in the middle of the two adjacent emitters with one plant in each side. The obtained results can be summarized as follows:-Data clearly illustrated that, the values of seasonal water applied, water stored in the effective root zone and water consumptive use were affected by irrigation intervals, where the highest overall mean values for the abovementioned three studied parameters were recorded under irrigation interval (I1) and the values are 1475.52, 1205.20 and 1059.44 m 3 /fed. On the other hand, the lowest values for the same abovementioned studied parameters were recorded under irrigation interval, I5 and the values are 990.64, 905.16 and 850.44 m 3 /fed. for seasonal water applied, water stored in the effective root zone and water consumptive use, respectively. Generally, the values of the three abovementioned studied parameters can be descended in order (I1) > (I2) > (I3) > (I4) > (I5). Concerning water application efficiency (WAE%) the mean values were slightly affected by irrigation intervals. The highest mean values were recorded under irrigation interval (I4) and the values are 94.92 and 94.47 %. The lowest mean values were recorded under irrigation interval (I1) and the values are 81.57 and 81.79% in the first and second growing seasons, respectively. Regarding, water productivity (WP) and productivity of irrigation water (PIW), the highest overall mean values were recorded under irrigation interval (I5) and the values are 1.38 and 1.19 kg/ m 3. Meanwhile, the lowest overall mean values were recorded under irrigatio...
and 2009 growing seasons. The objective of this research was aimed to find out the optimum seedling age and nitrogen levels to obtain maximum production of hybrid rice varieties under normal soil. Growth analysis, grain yield and its components, N-uptake and nitrogen use efficiency were determined. The most important obtained results could be summarized as follows: In both seasons, SK2034H hybrid rice variety significantly exceeded SK2058H variety. and recorded the highest dry matter production, plant height, number of panicles/m 2 , number of spikelets/panicle, number of filled grains (%), panicle weight, grain yield, N content, N-uptake for grains and straw and N-use efficiency (NUE). 25 day old seedlings had higher values of dry matter (DM), leaf area index (LAI), plant height, grain yield, harvest index (HI), and most of its attributes, nitrogen content, N-uptake, and use efficiency (NUE) than old seedlings 35 or 40 day old. The minimum values of these traits were obtained when plants were transplanted with 40 day old seedlings. Increasing nitrogen fertilizer levels significantly improved growth, yield and its components. Each unit increase in N-levels led to a significant increase in all these traits. Nitrogen use efficiency (NUE) was significantly higher at lower N levels and decreased significantly with increasing N fertilizer levels. On the other hand, N-content and N-uptake for grain and straw yields significantly increased by increasing the nitrogen fertilizer level up to 220 kg N/ha. The interaction between hybrid rice varieties and seedling age significantly affected dry matter, panicle weight, 1000-grain weight, grain yield and N-uptake for grains. A significant interaction effect between hybrid rice varieties and N fertilizer levels for dry matter, grain yield and N-uptake for grains. The interaction between seedling age and nitrogen levels significantly affect dry matter, number of spikelets/panicle and grain yield. It could be concluded that hybrid rice varieties must be transplanted with seedling, 25 days old, fertilized at a rate of 220 kg N/ha in three equal splits to get maximum grain yield per unit area.
Two lyzimeter investigations were carried out at Sakha Agricultural Research Station, Kafr El-Sheikh Governorate. The site of this investigation is located at 31 o 05 -So, in conclusion, the study recommend planting the cultivar Misr-2 for irrigation with drainage water because it is the least affected by heavy metals and salinity.
A field experiment was conducted at the Experimental Farm of Sakha Agric. Res. Station during the two summer growing seasons (2012 and 2013), to evaluate the effect of distance from drain line (1/4 and 1/2 distance from drain line) and applied N-fertilizer rate (90, 120 and 150 kg N/fed) on yield and yield components as well as N-content of two maize hybrids (single pioneer hybrid No. 10 (V2) and ternary hybrid No 329 (V1)) in clay soils. The tile lines were spaced to simulate a 20 m spacing and 1.2 m depth with a slope of 0.1%. Data showed that: Water table depths were increased with increasing time after irrigation. Water table depth near the drains was higher than in midway between drains. Soil bulk density was lower near the drain and gradually increased towards the midway between drains. Decreasing distance from drain line from L/2 to L/4 resulted in a significant increase in yield and yield components of maize crop as well as N-content (kg/fed.) and protein percentage in both seasons. Maize grains yield, 100 grains weight, ear diameter and Plant height increased with increasing rate of N-fertilization. The values of maize grain yield were 25.71, 27.66 and 29.68 ardab/fed in the first season and 26.23, 28.62 and 30.72 ardab/fed in the second season for 90, 120 and 150 kgN/fed., respectively. The corresponding values of protein percentage were 6.01, 11.68 and 15. 55 % in the first season and 5.94, 11.54 and 15.52 % in the second season, respectively. Data showed that V2 resulted in a significant increase in the grain yield, 100 grain weight and Plant height of maize crop. The combination between distance from drain line and 150 kgN/fed resulted in a high yield and yield components as well as N-content of maize crop. Maize varieties resulted in somewhat differences in the grain yield, 100 grains weight, ear diameter and Plant height as well as N-content and protein percentage of maize crop in both seasons with every N-fertilization. The highest values of grains yield, 100 grains weight, Ear diameter and Plant height as well as N-content and protein percentage of maize crop were obtained with combination between L/4, 150 kgN/fed and V2 while, the lowest values were obtained with interaction of L/2, 90 kgN/fed and V1 in both studied seasons. The obtained results revealed also, that 20 m drains spacing in clay soils is not the proper but may be economic. In addition, distance from drain line must be taken into consideration when distributing fertilizer treatments and their replicates in fertilization experiments to obtain reliable results.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.