Kabak bitkisi (Cucurbita pepo L.) ekiminde uygulanan farklı oranlarda azotun bitki gelişimine, verimine, su tüketimine ve su kullanımına etkisi

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Ünlükara A., Dumanlar N., Güneş A.

Mustafa Kemal Üniversitesi Tarım Bilimleri Dergisi, cilt.24, ss.196-210, 2019 (Hakemli Dergi)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 24
  • Basım Tarihi: 2019
  • Dergi Adı: Mustafa Kemal Üniversitesi Tarım Bilimleri Dergisi
  • Derginin Tarandığı İndeksler: TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.196-210
  • Erciyes Üniversitesi Adresli: Evet

Özet

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.