EFFECT OF SEWAGE WATER, PHOSPHORUS AND POTASSIUM FERTILIZATION ON ALFALFA YIELD | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 5, Volume 27, Issue 5, May 2002, Page 3577-3588 PDF (491.32 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2002.254777 | ||||
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| Authors | ||||
| A. S. Modaihsh,; N. F. Al-Qahtany; A. A. Taha; M. O. Mahjoub | ||||
| Soil Sci. Dept., College of Agric., King Saud University, Saudi Arabia | ||||
| Abstract | ||||
| A field experiment was established at the College of Agriculture Experimental and Research Farm at Dirab, south Riyadh, during 1995-1996 season to study the effect of sewage water irrigation, P and K fertilization on yield of alfalfa (Medicago sativa L; var. CUF101) and availability of P and K in the soil. Two different soils in textures were used in this study namely; loamy and sandy soils. The results showed that application of sewage water resulted in a significant increase in alfalfa dry weight under the various levels of P and K. Irrigation with sewage water gave significantly higher yield of alfalfa than that of well water, regardless of P and K treatments in both soils. Application of 50, 150, and 250 kg P ha-1 gave significantly higher yield of alfalfa grown under well water irrigation. The percent increment in alfalfa dry weight were 16.0, 29.5 and 35.0% in loamy soil and 18.1, 24.3 and 37.3% in the sandy soil. In contrast, the rate of increase due to P application was less pronounced under sewage water irrigation. Application of K either at a lower rate (50 kg K ha-1) or at a higher rate (100 kg ha-1) resulted only in a minor increase in alfalfa yield. The results indicated that the effect of sewage water irrigation was conspicuous on available P content of the soil and resulted in a higher P plant content even if no P fertilizer was applied. Data for available K in the soil indicated a significant decrease in K level regardless of K addition. | ||||
| Keywords | ||||
| Sewage water; well water; P and K fertilization; soil texture; alfalfa | ||||
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