Tag Archives: Water consumption

The Suitability of CropWat 8 Program in Scheduling Irrigation and Water Consumption Estimation for Some Crops and Fruit Trees in Damascus Countryside

Ayman Hejazi*(1) Rabiaa Alhayek(2) and Mohammad Hakkoun(1)

(1). Natural Recourses Research Administration, General Commission for Scientific Agricultural Research (GCSAR), Damascus, Syria.
(2). Agricultural Research Center of Salamya, (GCSAR), Hama, Syria.

(*Corresponding author:  Eng: Ayman Hejazi. E-Mail: siraiman@yahoo.com).

Received: 30/06/ 2015                                     Accepted: 07/09/ 2015

Abstract

This theoretical study was carried out in 2014 to study CropWat 8 model suitability to estimate water requirements and irrigation scheduling for some fruit trees and crops, using field trials data, which had been executed at Nashabia Irrigation Research Station, Damascus Countryside, Syria. The data that have been gotten of the net water consumption and number of irrigations for apricot, olive trees, tomato, and maize of field trials were compared with those results that have been gotten using the program . The results showed an increase in the estimated value as compared with real one for water consumption with a percentage of (1%) for apricot, and (23%) for tomatoes. The means differences between the estimated and real values, using T-test (paired samples) by SPSS showed insignificant differences for apricot, olive, and maize, except tomato where the differences were significant at 5% level of probability, also it was noticed in terms of the number of irrigations that there was a high matching between the estimated and real values for apricot, olive, and corn, but for tomatoes there was a difference in about 4 irrigations, this difference is due to the difference in crop coefficient values between the estimated program value and the calculated (real value). The simulation model curve of changes in soil moisture was similar to the changes in moisture in the field conditions to a large extent. Root mean square error (RMSE) values for water consumption of apricot, olive, tomato, and corn were as follows: 6.4, 14.5, 45.41, and 26.53 respectively, while the values of Index of Agreement (d) were as follows: 0.98, 0.83, 0.81, 0.94 respectively, which indicates a good matching between estimated and real values.

Key words: CropWat8, Water consumption, Irrigation scheduling.

Full paper in Arabic:

مدى ملائمة برنامج CropWat8  لجدولة الري وتحديد الاستهلاك المائي لبعض المحاصيل والأشجار المثمرة المزروعة في غوطة دمشق

Effect of Drip Irrigation Methods (Mulched, Without Mulch) on Water Use and Production of Tomato Crop under Organic Farming

Abd Al-Kareem Jerdy(1) Bassam Oudeh*(1) Haitham Al-Abdalla(2) Tallal Al- Abdo(1) and Boshra khozam(2)

(1). Mokhtaria Research Station, Homs Agricultural Research Center, General Commission for Scientific Agricultural Research (GCSAR), Homs, Syria.
(2). Homs Agricultural Research Center, (GCSAR), Homs, Syria.

(*corresponding author: Eng. Bassam Oudeh, Mokhtaria Research Station, Homs Agricultural Research Center, GCSAR, Homs, Syria. Mobile: 0988284819, Email: B_oudeh@hotmail.com).

Received: 12/07/ 2014                                     Accepted: 29/03/ 2015

Abstract

The study was carried out in Mokhtaria Research Station, Homs Agricultural Research Center, General Commission for Scientific Agricultural Research Center, Homs, Syria, during 2008-2009 and 2009-2010 seasons. Two methods of drip irrigation were applied (mulched, without mulch) on tomato crop to be compared with the traditional method (surface irrigation). The results showed that the average of the total water consumption for the drip irrigation (mulched) was 3345 m3/ha and percentage of saving water irrigation was 55% as compared with control (traditional surface irrigation), while the average of the total water consumption for the drip irrigation (without mulch) was 3785 m3/ha and percentage of the saving water irrigation was 49% as compared with control, although the average of the total water consumption for the traditional surface irrigation was 7426 m3/ha. In terms of farming method (traditional and organic) the production under drip irrigation (mulched) were 29.7 and 38.4 ton/ha, with an increment in yield of (60 and 68%) as compared with the control (surface irrigation) which were 18.6 and 22.9 ton/ha (traditional and organic), respectively. On the other hand the production under drip irrigation (without mulch), in terms of farming method (traditional and organic) were 38.4 and 45.1ton/ha with an increase in yield 106 and 97%, respectively as compared with the control.

Key words: Drip irrigation, Surface irrigation, Organic farming, Tomato, Production, Water consumption

Full paper in Arabic: تأثير طريقة الري بالتنقيط (مغطى ومكشوف) في الاستهلاك المائي وإنتاجية البندورة ضمن ظروف الزراعة العضوية