| Titles |
|
English :
|
Interaction effect of soil moisture stress and some mineral fertilizers on crop yield, its components and water relationships of wheat plants grown on a calcareous soil
|
|
Arabic :
|
التأثير المشترك للإجهادالرطوبى فى التربة وبعض المخصبات المعدنية على المحصول ومكوناته والعلاقات المائية لنباتات القمح النامية فى أرض جيرية
|
|
| Abstract |
A field experiment was conducted on a calcareous soil cultivated with wheat (Triticum aestivum, c.v. Sakha 68) during two successive seasons of 2002/2003 and 2003/2004 at El Yaman village, Mariut region, Western Desert of Egypt. This work aims to study the effect of irrigation period intervals in combination with different rates of nitrogen and potassium fertilizers on vegetative growth, biological yield, grain yield, NPK uptake, nitrogen recovery, nitrogen use efficiency, water consumptive use and water use efficiency. Three irrigation intervals were applied at periods of 7, 14 and 21 days (main plots). The mineral fertilizers of nitrogen and potassium (ammonium and potassium sulphates) were also added in three rates, i.e , 50, 80 and 100 kg N/fed (subplots); 30, 50 and 80 kg K2O/fed (sub subplots).
The obtained results showed pronounced increases for vegetative growth (fresh weight), biological yield (straw + grains), grain yield, NPK uptake, nitrogen recovery, nitrogen use efficiency, and water use efficiency at the combined treatment of 14 days irrigation intervals, 100 kg N/fed and 80 kg K2O/fed. This treatment was the most appropriate combination to increase the values of the aforementioned parameters with about 30-40 %. Also, it is noticed that nitrogen use efficiency tended to decrease with increasing K rates and the water consumptive use recorded the highest values at irrigation treatment of 7 days interval periods. Furthermore, either increasing soil moisture stress (prolonged irrigation frequency at 21 irrigation intervals) or decreasing the applied N and K rates led to negatively affected the abovementioned parameters.
In general, the obtained water consumptive (WCU) use and water use efficiency (WUE) have been drastically decrease and increase, respectively, under 14 days irrigation interval periods. In addition, fertilization management, by using the mineral N and k rates, reflect upon the significant changes in the WCU and WUS values of wheat crop. The superior combined treatment (14 days irrigation interval periods, 100 kg N/fed and 80 kg K2O/fed) emphasized the abovementioned results by either greatest lowering WCU or increasing WUE values. Thus, it could be saved more than 50 % of irrigation water as a result of increasing WUE by 30 % under the conditions of the studied experiments
|
| Publication year |
2006
|
| Pages |
356-370
|
| Availability location |
Soils, Water and Environment Research Institute, ARC, 9 Cairo Univ. St., Giza, Egypt
|
| Availability number |
|
| Organization Name |
Soil, Water and Environment Research Institute (SWERI)
|
| City |
Zagazig
|
| serial title |
Egyptian Journal of Applied Sciences
|
| ISSN |
1110-1571
|
| Author(s) from ARC |
|
| Agris Categories |
Soil erosion, conservation and reclamation
|
AGROVOC
TERMS |
Calcareous soils.
Efficiency.
Irrigation scheduling.
Nitrogen.
Potassium.
Water depletion.
Water use.
Wheats.
|
| Publication Type |
Journal
|