Effect of deficit irrigation and kaolin clay on yield and yield components of pumpkin (Cucurbita pepo L.)

Abstract This experiment was conducted to determine the effect of kaolin clay application and deficit irrigation on quantitative characteristics pumpkin in a field located Siahbaz village Khoy, Iran. In order investigate yield components ( Cucurbita pepo L.), this experimental considered. An performed with at four levels (complete irrigation, from shoot stage, flowering stage seed filling stage) three foliar (control, 3% 6% kaolin) Analysis variance showed that had significant number seeds per fruit, fruit yield, 1000 grain weight, biological harvest index, oil protein percentage, yield. Maximum weight (294.5 gr), (807 kg ha −1 ), percentage (46.2) (373.3 ) were related complete treatment. The highest (257.07 (733 (23.8 observed kaolin. Based results, superior other treatments. Kaolin no could be interrupted once without irrigation. used under limitation conditions partially offset water-deficit due control Due lack water, untreated plants lower than kaolin-treated ones.