Effect of organic fertilizer (pow humus) and potassium in the vegetative growth of tomato plant Lycopersicon esculentum Mill protected unheated conditions in sandy soil in Najaf al ashraf .Iraq.

Ali M.M.altalal Razzak k.R.aljebory

Abstract

An experiment was conducted on tomato plant (Dombito hybrid ) during the season of 2016/2017  in one of unheated plastic houses in the Technical Institute

/ Kufa in sandy soil, in the Governorate of Najaf al ashraf  Iraq.This study included  (16) interaction  treatments this was agreement   between four levels of granules of  Humat potassium (pow humus) as a source of Humat (85%) is as a level of  (0, 30, 60 and 90) g / m ², and four levels of potassium are as levels of (0, 20, 40 and 60) kg / D used potassium  nitrate (KNO3) (46.6%), as a metallic potassium fertilizer. Each of potassium nitrate and potassium Humat ware added at  four  intervals  : -

1-The first payment addition was done  to the soil (before (7) days) transplanting

2-The second  was done with irrigation water, (15 days)   after transplanting.

3- The third addition was done with irrigation water  after bud

opened .

4-  The fourth addition was done  after fruits setting.
To study the effect the of  vegetative growth of  tomato plant in under plastic house conditions in sandy soil in the Governorate of Najaf ..
Experiment was adopted  according to the Split-Plot-Design with  three replicates means  were compared according to Duncan's Multiple Range test at the probability level of o.o5 .
Results showed superiority  of  all treatment  belong to  (Humat potassium ((T, and all treatment of potassium addition  A) in comparison, to control treatment in all vegetative growth and also interaction of ( T) x (A) significantly affected the above parameters compared  to control treatment for the four picking (3, 6 , 9 ,  12 )

The highest value for vegetative traits (plant height / cm, number of leaves / plant, leaf area / cm ², leaf dry weight / g)ware obtained from (t₄a₄)
(add 90 g / m ² Humat potassium interacted  with 60 kg / D / potassium))

The addition of it was  respectively to recipes as aforesaid (236.5 cm), (59.25) and leaves / plants, (2988) cm ², (9.19) g / plant, while , the 9^th and 12^th picking showed significant superiority in the  most vegetative parameters , as achieved the highest values ​​compared to the 3^rd and 6^th pickings .