The effect of nitrogen and phosphorus fertilization on yield, some fruit characteristics, hormone concentrations, and alternate bearing in pistachio

TUNA GÜNEŞ N., Okay Y., Koksal A. I., Koroglu M.

TURKISH JOURNAL OF AGRICULTURE AND FORESTRY, cilt.34, sa.1, ss.33-43, 2010 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 34 Sayı: 1
  • Basım Tarihi: 2010
  • Doi Numarası: 10.3906/tar-0810-15
  • Dergi Adı: TURKISH JOURNAL OF AGRICULTURE AND FORESTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.33-43
  • Anahtar Kelimeler: Alternate bearing, fertilization, GA(3), IAA, nut weight, Pistacia vera L., POTASSIUM, TREES
  • Ankara Üniversitesi Adresli: Evet

Özet

This research was carried out in order to determine the effects of nitrogen and phosphorus fertilization on yield, some fruit characteristics, hormone concentrations, and alternate bearing in pistachio (Pistacia vera L.) cv. 'Kirmizi' grafted on P vera over 3 consecutive years. Nitrogen was applied at the rate of 0 (control), 800, 1000, and 1200 g tree(-1) 1, and phosphorus was applied at the rate of 0 (control), 200, 400, and 600 g tree(-1) into the soil. As a result, although yield mostly decreased and nut weight increased, especially in the 2(nd) year ('off' year), considerable interactions among fertilizer rates were determined for only nut weight, auxin, gibberellic acid, and zeatin concentrations (P <= 0.05). For all parameters investigated in this study, a stable and regular effect of fertilizers applied into the soil was not observed, probably because of this species' characteristics. Therefore, further research, including longer treatment periods, is needed to determine the effects of fertilizers.