Effect of NPK, HUMIC acid, and GA3 on pistachio growth and mineral content

Abstract EN

This nursery study was conducted during growing season 2013, to investigate the effects of NPK (0, 15 and 30g/seedling), and humic acid (0, 3 and 6 ml/L) with three spray concentrations of GA3 (0, 100 and 200 ppm) on seedlings growth of Pistacia vera L.

Antep cv.

The results showed that the treatment of 15g NPK/seedling + 6ml/L humic acid and 100ppm GA3 increased significantly the height of seedlings, dry matter of leaves and potassium content in leaves.

While the treatment 15g/ seedling NPK + 3ml/L humic acid increased noticeably the diameter of seedlings.

On the other hand, the treatment 200ppm GA3 augmented considerably the number of branches.

However, the total chlorophyll content in leaves was increased significantly when treated with 30g NPK/seedling.

The dry matter of roots and P content in leaves were remarkable when treated with 30g NPK /seedling+ 3ml/L humic acid +200ppm GA3.

Regarding the increasing of N content in leaves, thus the best treatment was 30g NPK/seedling + 6ml/l humic acid.