Irrigation Agronomyhttp://ir.haramaya.edu.et//hru/handle/123456789/282024-03-29T09:46:33Z2024-03-29T09:46:33ZEFFECT OF DIFFERENT LEVELS OF SUPPLEMENTARY IRRIGATION ON YIELD AND YIELD COMPONENT OF MAIZE (zea mays L) AT TEPPI, SOUTH WEST ETHIOPIAZinaw AsayeTilahun Hordofa (PhD)http://ir.haramaya.edu.et//hru/handle/123456789/72032024-01-02T06:56:36Z2017-04-01T00:00:00ZEFFECT OF DIFFERENT LEVELS OF SUPPLEMENTARY IRRIGATION ON YIELD AND YIELD COMPONENT OF MAIZE (zea mays L) AT TEPPI, SOUTH WEST ETHIOPIA
Zinaw Asaye; Tilahun Hordofa (PhD)
Maize (zea mays L) is one of the most important cereal crops grown in Ethiopia. Field experiment was undertaken on clay loam soil at Teppi national spice research center, Ethiopia during 2013/2014 cropping season with the objectives of investigating the effect of supplementary irrigation on yield and yield component of maize for achieving maximum crop yield in rain fed agriculture during belge season. The experiment was laid out in RCBD (Randomized Complete Block Design) with three replications. Treatments include seven levels of supplemental irrigation treatments and a control irrigation receiving no supplemental irrigation. The irrigation water was applied when the soil moisture depleted reached 55% of total available water (p=0.55). The supplemental irrigation levels had shown a highly significant (p<0.01) effect on grain yield of maize and gave increased water use efficiency. However, the treatments did not affect leaf area. The supplemental irrigation levels had also a significant (P<0.05) effect on days to tasseling, silking and days to maturity. The maximum yield of 67 q/ha was recorded from 100% ETc (Crop Evapotranspiration) which was not significantly different from 75% ETc and the minimum yield of 25q/ha was gained from rain fed treatment. In terms of water use efficiency rain fed treatment had the highest crop water use efficiency which has significantly different from all other treatment. Yield response factor (Ky) was separately calculated for the growing season and was found to be 1.25 the highest value and 1.05 the lowest value. Therefore, it is recommended that to apply 75% ETc which gave 6.16 ton/ha which improve WUE (Water Use Efficiency) without significant reduction of yield.
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2017-04-01T00:00:00ZEFFECT OF DEFICIT IRRIGATION AND MULCH LEVELS ON YIELD COMPONENTS, YIELD, AND WATER USE EFFICIENCY OF HOT PEPPER (Capsicum annuum L.) IN HARAMAYA DISTRICT, EASTERN ETHIOPIAAddis Hailu DemoKibebew Kibret (PhD)http://ir.haramaya.edu.et//hru/handle/123456789/54032023-03-16T08:19:36Z2021-02-01T00:00:00ZEFFECT OF DEFICIT IRRIGATION AND MULCH LEVELS ON YIELD COMPONENTS, YIELD, AND WATER USE EFFICIENCY OF HOT PEPPER (Capsicum annuum L.) IN HARAMAYA DISTRICT, EASTERN ETHIOPIA
Addis Hailu Demo; Kibebew Kibret (PhD)
The increasing scarcity and competition for irrigation water demands for adoption of
innovative practices that increase efficient water use. In the context of improving water
use efficiency, there is a growing interest in deficit irrigation which provides a means of
reducing water consumption while minimizing adverse effects on yield. A field experiment
was conducted at Haramaya University to investigate the effects of deficit irrigation and
straw mulch levels on yield components, yield and water use efficiency of hot pepper
(Capsicum annuum L). The experiment was laid out in a randomized complete block
design in factorial arrangement with three levels of irrigation (100%, 75% and 50% of
ETc) and four levels of straw mulch (0, 3, 6 and 9 tonnes of vetiver grass straw per ha) in
three replications. The output of CROPWAT model indicated that the highest seasonal
water requirement of hot pepper was 275.66 mm at 100% ETc, while the lowest was
137.83 mm at 50% ETc. The analysis of variance revealed that the interaction effects of
deficit irrigation and straw mulch levels on growth (p < 0.05) and yield (p < 0.01)
parameters were significant. The highest marketable yield (12.36 t/ha) was obtained from
an experimental plot treated with combined application of 100% ETc and 6 t/ha straw
mulch, while the lowest (4.66 t/ha) was obtained from plots that received 50% ETc
irrigation and no mulch. Water use efficiency was also highly significantly (p<0.01)
influenced by the interaction effects of deficit irrigation and straw mulch levels, with the
highest (6.65 kg/m3
) and the lowest (3.25 kg/m3
) values recorded from the plots that
received 50% ETc irrigation and 9 t/ha straw mulch, and 100% ETc irrigation and no
mulch, respectively. The Partial budget analysis revealed that combined application of
75% ETc irrigation and 6 t/ha straw mulch is the most attractive management in economic
terms since it gave the highest net benefit. Therefore, in terms of marketable hot pepper
yield, economically attractive and water use efficiency, irrigating with 75% ETc combined
with 6 t/ha straw mulch can be recommended for profitable production of hot pepper in
the study area and others with similar agroecology.
92p.
2021-02-01T00:00:00ZEFFECT OF DEFICIT IRRIGATION AND MULCH LEVELS ON YIELD COMPONENTS, YIELD, AND WATER USE EFFICIENCY OF HOT PEPPER (Capsicum annuum L.) IN HARAMAYA DISTRICT, EASTERN ETHIOPIAHailu Demo, AddisKibret, (PhD) Kibebewhttp://ir.haramaya.edu.et//hru/handle/123456789/48942022-03-28T06:01:27Z2021-02-01T00:00:00ZEFFECT OF DEFICIT IRRIGATION AND MULCH LEVELS ON YIELD COMPONENTS, YIELD, AND WATER USE EFFICIENCY OF HOT PEPPER (Capsicum annuum L.) IN HARAMAYA DISTRICT, EASTERN ETHIOPIA
Hailu Demo, Addis; Kibret, (PhD) Kibebew
The increasing scarcity and competition for irrigation water demands for adoption of
innovative practices that increase efficient water use. In the context of improving water
use efficiency, there is a growing interest in deficit irrigation which provides a means of
reducing water consumption while minimizing adverse effects on yield. A field experiment
was conducted at Haramaya University to investigate the effects of deficit irrigation and
straw mulch levels on yield components, yield and water use efficiency of hot pepper
(Capsicum annuum L). The experiment was laid out in a randomized complete block
design in factorial arrangement with three levels of irrigation (100%, 75% and 50% of
ETc) and four levels of straw mulch (0, 3, 6 and 9 tonnes of vetiver grass straw per ha) in
three replications. The output of CROPWAT model indicated that the highest seasonal
water requirement of hot pepper was 275.66 mm at 100% ETc, while the lowest was
137.83 mm at 50% ETc. The analysis of variance revealed that the interaction effects of
deficit irrigation and straw mulch levels on growth (p < 0.05) and yield (p < 0.01)
parameters were significant. The highest marketable yield (12.36 t/ha) was obtained from
an experimental plot treated with combined application of 100% ETc and 6 t/ha straw
mulch, while the lowest (4.66 t/ha) was obtained from plots that received 50% ETc
irrigation and no mulch. Water use efficiency was also highly significantly (p<0.01)
influenced by the interaction effects of deficit irrigation and straw mulch levels, with the
highest (6.65 kg/m3
) and the lowest (3.25 kg/m3
) values recorded from the plots that
received 50% ETc irrigation and 9 t/ha straw mulch, and 100% ETc irrigation and no
mulch, respectively. The Partial budget analysis revealed that combined application of
75% ETc irrigation and 6 t/ha straw mulch is the most attractive management in economic
terms since it gave the highest net benefit. Therefore, in terms of marketable hot pepper
yield, economically attractive and water use efficiency, irrigating with 75% ETc combined
with 6 t/ha straw mulch can be recommended for profitable production of hot pepper in
the study area and others with similar agroecology.
92p.
2021-02-01T00:00:00ZRESPONSE OF ONION (Allium cepa L.) TO DEFICIT IRRIGATION AND MULCH ON YIELD AND WATER PRODUCTIVITY UNDER HARAMAYA, ETHIOPIAMusa, AbdiAlemayehu, (PhD) YibekalHordofa, (PhD) Tilahunhttp://ir.haramaya.edu.et//hru/handle/123456789/38922021-07-06T03:23:05Z2021-02-01T00:00:00ZRESPONSE OF ONION (Allium cepa L.) TO DEFICIT IRRIGATION AND MULCH ON YIELD AND WATER PRODUCTIVITY UNDER HARAMAYA, ETHIOPIA
Musa, Abdi; Alemayehu, (PhD) Yibekal; Hordofa, (PhD) Tilahun
Improving water productivity for sustainable crop production and water savings represents a
major challenge for agricultural water management in water scarce areas. A field experiment
was conducted at Haramaya University experimental site during 2019/2020 irrigation season
to evaluate the response of onion yield and water productivity to deficit irrigation levels and
mulch techniques. The treatments include 100, 85, 70 and 55% of ETc applications. The
experimental design was a split plot in RCBD arrangement with three replications. Crop
water requirement was estimated using actual daily climatic temperature data. The analysis of
variance revealed that there was a highly significant (p<0.01) difference among growth
parameters, yield and yield parameters. The interaction effect of mulch and irrigation has also
shown a significant effect for bulb height and unmarketable bulb yield except for leaf number
per plant and a highly significant (p<0.01) effect for the rest parameters considered. The
maximum yield of 38.43 ton/ha was recorded from 100% ETc with plastic mulch whereas the
minimum yield of 16.36 ton/ha was recorded from 55% ETc with no mulch. The highest water
productivity (9.08 kg/m3) was obtained from the plots treated with 70% ETc application under
plastic mulch and shows no significant differences with 85% ETc application under plastic
mulch and 70% ETc application under straw mulch. The lowest water productivity (6.57
kg/m3) was recorded from 55% ETc application under no mulch treatments. Budget analysis
revealed that the most economically feasible combination for small-scale grower farmers with
lower cost of production and maximum net return was from the application of 70% ETc and
85% ETc treated with straw mulch. Therefore, in terms of marketable bulb yield and water
productivity, irrigating with 70% ETc and straw mulch would be recommended for production
of onion in the study area.
87p.
2021-02-01T00:00:00Z