Effects of different nitrogen rate applications during sowing to pumpkin (Cucurbita pepo L.) growth, yield, evapotranspiration and water use efficiency
Abstract
Aims: In this study, effects of different nitrogen applications during sowing to pumpkin growth, yield, evapotranspiration and water use efficiency were investigated under irrigated agriculture in Kayseri province of Middle Anatolian Region of Turkey.
Methods and Results:
The study, designed in completely randomized block-plots with 4 replications,
was conducted in the experimental area of Erciyes University Agricultural
Research and Training Center. Develi pumpkin population (Cucurbita pepo L.) was
used. The treatments were N0, N20, N40, N60,
N80 and N100 that consisted of applications of 0%, 20%,
40%, 60%, 80% and 100% of pumpkin nitrogen need, respectively. The rest of
nitrogen amounts were applied by fertigation in 5 consecutive irrigations and
all treatment were received the same amount of nitrogen. Soil moisture of the
treatments were monitored by neutron meter. Depleted water from root zone was
applied by drip irrigation system. The highest total leaf area was determined
in N100 while the highest total chlorophyll amounts were determined
in N80 and N100. Nitrogen applications big than 80%
during sowing increased water use efficiency, fruit diameter, fruit yield, seed
yield per fruit and seed yield, significantly. Seed yield in N100
was found 139.6% higher than seed yield in N0. The least nitrogen rate during sowing for
Develi pumpkin population was offered as 100 kg per ha under controlled
irrigation conditions.
Conclusions: Application of whole nitrogen needs to pumpkin at sowing under controlled irrigation conditions possitively affected pumpkin seed yield and all growth parameters. At least 80% of pumpkin nitrogen need should be applied at sowing to obtaine higher yield and quality.
Significance and Impact of the Study: If pumpkin irrigations are performed by measuring soil moisture deficit in effective root zone, higher seed yield and quality would be obtained by applitying nitrogen need at sowing without dividing several parts.
Keywords
References
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Details
Primary Language
Turkish
Subjects
Agricultural Engineering
Journal Section
Research Article
Authors
Ali Unlukara
*
0000-0003-4931-8100
Türkiye
Nihal Dumanlar
0000-0002-1039-8249
Türkiye
Adem Güneş
0000-0003-0411-6134
Türkiye
Publication Date
December 27, 2019
Submission Date
December 2, 2019
Acceptance Date
December 18, 2019
Published in Issue
Year 1970 Volume: 24 Number: 0