Effect of Application Nitrophenolates and IAA on growth and yield of Squash (Cucurbita pepo)

Zhala Neamat Sabr; Sawsan Mohammed Saeed

doi:10.21271/ZJPAS.34.5.15

Authors

Zhala Neamat Sabr Deparment of Horticulture, College of Agriculture, Salahaddi1Deparment of Horticulture, College of Agriculture Engineering Sciences, Salahaddin University-Erbil, Kurdistan Region Iraq n University-Erbil
Sawsan Mohammed Saeed Deparment of Horticulture, College of Agriculture Engineering Sciences, Salahaddin University-Erbil, Kurdistan Region Iraq

DOI:

https://doi.org/10.21271/ZJPAS.34.5.15

Keywords:

Summer squash, fruit quality, quantity, Nitrophenolates, IAA, Growth stimulators

Abstract

A field experiment was conducted out from March 11^th to July 20^th to study the effect of foliar application nitrophenolates (0, 2, 4 and 6 ml.l^-1) biostimulators and IAA (0,150 and 300 mg. l^-1) on the growth and yield of summer squash. Nitrophenolates had the best significant effect on plant length and shoot dry weight (63.12 cm and 98.72 g respectively) were obtained with 2 ml.l^-1, leaf area (256.00 cm²) was measured in 4 ml.l^-1resentment. However, the best results of stem diameter (17.47 mm) was obtained from 300 ml.l^-1 IAA. The interaction of 2 ml.l^-1nitrophenolates and 300 mg. l^-1 IAA caused highest significant in Stem diameter (19.10 mm), plant length (69.20 cm) and fruit length (17.16cm), and the best results of fruit. weight Plot^-1, fruit weight plant^-1and fruit weight hectare^-1(7.30, 1.82 kg and 29.11 ton) were obtained from 150 ml.l^-1IAA without nitrophenolates treatments. 2 ml.l^-nitrophenolates is the best levels significantly effect on vegetative and reproductive parameter, however the interaction between IAA and nitrophenolate more significantly effects.

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