Journal of Food, Agriculture and Environment

Physiological influence of N in preventing of alternate-bearing of pistachio (Pistacia vera cv. Kalleh-ghuchi)

Author(s):

Mohammad E. Amiri

Recieved Date: 2009-05-18, Accepted Date: 2009-10-07

Abstract:

The physiological influence of N in preventing of alternate-bearing of pistachio (Pistacia vera cv. Kalleh-ghuchi) was studied in the Ghazel Ozen (south-west of Zanjan), Iran, during four years (2003-2006). Nitrogen as urea (CO(NH₂)₂, 46% N) at 100, 150 and 200 g actual N per tree were soil surface applied for both fruiting and non-fruiting of the 25 year-old trees. Floral bud abscission was influenced by the level of N application. It increased, through both in the low N and high N application, as compared to medium (150 g actual N tree^-1) levels. There was a strong relationship between leaf protein and N application, similarly as leaf protein increased, floral bud abscission decreased. Fresh weight of fruit per tree, as annual yield, was significantly (P=0.05) influenced by growth season, regardless of N application. “Off” year was the main factor that decreased nut yield (up to 30%) in control, but fruit quality (nut size, blanked %, protein and fat %) was less affected. The rate of fruit growth (dry weight) varied during fruit growth season for individual treatments. The rate of growth was associated with floral bud abscission, however, as the N application increased, percent of bud abscission decreased. Minerals and protein concentrations in leaves from fruiting branches were in most cases lower than that of nonfruiting ones. The floral bud abscission per cluster was very low during nut fill in “off” year trees compared with “on” year trees, there was a relationship between bud drops and consumption of N (protein concentration of kernel). This indicates that reproductive growth (nut growth) demand more N, especially in the “on” year.

Keywords:

Alternate-bearing, mineral concentration, nut quality, pistachio fruit characters

---

Journal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 3&4
Category: Agriculture
Pages: 301-305

---

Full text for Subscribers

---

Information:

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

---

Purchase this Article:   20 Purchase PDF Order Reprints for 15

---

Share this article :