EFFECT OF WATER QUANTITY AND FOLIAR SPRAY WITH SOME SAFELY SUBSTANCES ON GROWTH, YIELD QUALITY AND STORABILITY OF GARLIC 2- STORABILITY AND VOLATILE OIL PERCENTAGE

Rezumat

Two field experiments were carried out during two successive winter seasons of 2015-2016 and
2016-2017 at the Experimental Farm, El Kassasein Horticultural Research Station, Ismailia Governorate, to
clarify the effects of different rates of irrigation water ,i.e.( 1300, 1950 and 2600 m3
/ fed.) and foliar spray with
some safely substances ,i.e.( Potassium chloride at 1% ,Algae extract at 0.3%, Potassium humate at 0.2%,
Calcium carbonate at 6% and control treatment) on volatile oil percentage and oil yield per plant of garlic plants
(Allium sativum L.) cv. Chinese, grown under sandy soil conditions using drip irrigation system. This work
aimed also to study the effect of the abovementioned treatments on garlic plants during storage at different
periods; i.e., 40, 80, 120, 160 and 200 up to 320 days. Irrigation water quantity at 2600 or 1950 m3
/ fed. were
the superior treatments which significantly increased volatile oil percentage and oil yield per plant. Aqueous
solution of calcium carbonate at 6% and/ or potassium humate at 0.2% as foliar spray had a promotive effect, on
volatile oil percentage and oil yield per plant. The interaction between calcium carbonate at 6% and/ or
potassium humate at 0.2% and irrigation water quantity at 2600 or 1950 m3
/ fed. enhanced volatile oil
percentage and oil yield per plant. Regarding storage experiment, the obtained results showed that there were a
considerable and a continuous increase in weight loss and sprouting % as the storage period was extended, while
TSS% was increased by increasing storage period. Increasing irrigation water up to 2600 m3
/fed. significantly
increased weight loss and sprouting %, while TSS% was decreased. Foliar application with calcium carbonate at
6% and/ or potassium humate at 0.2% were the superior treatments for increasing TSS% and decreasing weight
loss and sprouting percentage. As for the triple interaction treatments, the beast values of weight loss, sprouting
and TSS% at the end of storage period were noticed by irrigation with1300 m3
/fed. and foliar spray with CaCo3
and/or potassium humate followed by irrigation with 1950 m3
/fed. with the same foliar application solutions