1. ADVANTAGES OF INTER-ESPECIFIC HYBRID COTTON VARIETIES
“IN THE MEDITERRANEAN AREA
BY PIVOT IRRIGATIONS”
Manuel Lopez Garcia
(Research Center IFAPA Centro Las Torres SPAIN)
Felipe Rey Montero
(Research Manager Semillas Sostenibles Iberica SPAIN)
Khaled Shalabi
(Agricultural Research Engineering Institute- ARC-Giza, EGYPT)

2. Objectives of the study
The main objective of this research is the study of the behavior of the different varieties planted in Spain through fertirrigations system through pivot in order to observe which species are better adapted to our growing needs This study started in 2014 and was presented by the same authors in Sharm El Sheikh October The study presented in 2015 compared the two most efficient fertirrigation systems LEPA irrigation (Low energy applications precision) and its impact on the varieties studied in both performance (kg / ha) and fiber characteristics (HVI system). The conclusions of the trial demonstrated the supremacy of the hybrid varieties against the hirsutum and barbadense, and regarding the irrigation system, the pivot system demonstrated greater efficiency.

3. Introduction
Spain cotton area has "Mediterranean climate", the temperature varies widely during the growing season (April-October), variations between 15 ° C to 43 °C. are normal

4. Average Tº Year 2016 in trials area
Red color Tº Max
Green color Tº Average
Blue color Tº Min

5. AVERAGE Tº YEAR (2016) In Trial Área

6. Introduction
ELS fiber production began in Spain in 2007 and in 2016 reached hectares with an average yield of fiber of kg / has
The ELS varieties used by producers are only interspecific hybrid varieties, are the only ones able to adapt to our GD-15,5Cº
GD-15,5Cº has a range between GD/1.350 GD
Manuel Lopez Garcia

7. The graphics show 1.285 DG-15,5ºC (from planting to harvest )

8. Material and methods
The field was located in Seville (Spain SW 37º 4'N)
  The soil type is called "Vertisol" (deep, fertile soil and its physical composition is clay loam)   

9. Material and methods
The trial consists in thirteen varieties with four replications (split plot). The elemental plot was 4 row 10 meters long with a separation between row 0.75 meters.
The distance between repetitions was two meters.
The planting was effected on April 28, resulting population density was plants/Ha

10. Varieties Used in the Trial
Material and methods
Varieties Used in the Trial
The Hirsutum and Barbadense varieties used in the trial are commercial varieties.
The hybrids there are 4 commercial varieties and the rest are experiential varieties in ways to be registered in OECD.
The seed used was delinting seed with sulfuric acid and treated with carboxin at the usual doses

11. Material and methods Pívot Caracteristic
Center Pivot Western 8120 model for 60Ha.
6-5/8” diameter spans and Overhang with Flexible drops at 1.2m over the ground, 15PSI Pressure Regulators and Nelson D3000 Sprays with Brown pads (For low crop as cotton).
High float Wheels and 1HP  UMC gearmotors
The approximate caudal is 1,3 liters/seconds/hectare

12. Material and methods
PIVOT CALENDAR 2016

13. Material and methods
For the analysis of monitoring and predictions irrigation strategies has been used simulation software "PRECISION CROP MANAGEMENT"
The following screens allow us to better understand the qualities of this program

14. Material and methods

15. Agronomic Variety Results Yield (gross & fiber)

16. Agronomic Varieties Results Yield (gross & fiber)

17. Quality Fiber HVI

18. Quality Fiber 2016 HVI Main Parameters

19. Quality Fiber Lengh

20. Quality Fiber Strengh

21. Quality Fiber Micronair

22. Quality Fiber Uniformity

23. Quality Fiber Elongations

24. Conclutions
The results obtained in this trial, carried out in 2016 and presented at Luxor 2018, reinforce the data obtained in 2014 and presented in 2015 in Sharm El Sheik.
YIELD Kg/Ha.
The yield in kg / Ha / fiber of the hybrid varieties was equal or superior to the hirsutum varieties and much higher than the Barbadian varieties
The yield in kg / Ha / gross of the hybrid varieties was higher than the hirsutum varieties and much higher than the Barbadian varieties
The vigor of the hybrids allowed its viability in extreme conditions impossible for the Barbadian varieties
FIBER QUALITY (HVI)
The quality of the fiber measured in HVI of the hybrid varieties (all within the ELS parameter) was lower than that of the California-type Barbadian varieties and very similar to the Asian-like Barbadian varieties

25. We will give future to cotton

26. Thanks to all