دراسة تأثير طرق تحسس رطوبة التربة على الصفات النباتية لمحصول القرع المزروع تحت منظومة الري بالتنقيط

الملخص EN

This study was carried out on a filed experiment of transplanting Squash crop "Cucurbit a pepo L." at 15/04/2003.

This experiment was conducted on (R.C.B.D.) in split plots system, where the dripper type represent the main plots in two kinds (Spiral & In-Line) & the soil moisture sensing methods represent the sub-plots in three kinds (Gypsum block, tensiometer & estimation method) all the units where at filed capacity with three replication for each experimental unit.

The following parameters were studied: Germination percentage of harvested squash fruits, plant height, leaf area, fruit yield, fresh weight& root weight.

The most important results were as following: 1-The locally manufactured gypsum blocks had shown a little variation coefficient (4.57%) which means that it accuracy is suitable for irrigation scheduling processes reading by the AC excitation reader who have a stable readings locally manufacturS 1.

The spiral dripper had overcome the in-line dripper in the following parameters: Plant leaf area (3.452 m2 per plant), squash yield production (19.6 Mg per ha.).

The in-line dripper had overcome on the spiral dripper significantly in the following parameters: seed germination percentage of harvested squash fruits (77.8%)< plant height (77.1 cm), fresh weight (1.621 Kg/plant), and plant root weight (31 gm /plant).

2.

The sensing method had the significant difference in production parameters of the plant where the gypsum block had overcome on the tensiometer & estimation method where the seed germination percentage of harvested squash fruits (80.3%) plant height (76.9 cm), leaf area (3.675 m2/ plant) yield production (21.2 Mg per ha.), fresh weigh (1.732 Kg per plant) roots weight (33 gm per plant).

Although the tensiometers had overcome the other sensing methods in Water Application efficiency significantly where was (91%).