EFFECT OF ZINC AND PHOSPHORUS FERTILIZATION ON RICE CROP UNDER SALINE SOIL CONDITIONS | ||||
| Journal of Plant Production | ||||
| Article 8, Volume 2, Issue 5, May 2011, Page 755-771 PDF (594.59 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2011.85610 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| H. S. Gharib1; B. A. A. Zayed2; S. Gh. R. Sorour1; Amira M. E. Okasha2 | ||||
| 1Agronomy Dept., Fac. Agric., Kafrelshiekh University, Egypt. | ||||
| 2Rice Research and training center, Sakha, Kafrelshiekh, Field Crop Research Institute, ARC. Egypt | ||||
| Abstract | ||||
| Two field experiments were conducted at the Experimental Farm of El-Sirw Agricultural Research Station, Dammietta Governorate, Egypt, in 2007 and 2008 seasons, to study the effect of phosphorus rate (0, 18, 36, and 54 kg P2O5/ha) and Zinc rate (0, 12, 24 and 36 kg ZnSO4/ha) on productivity of some rice cultivars (Giza177, Giza 178 and Sakha104 as inbred cultivars and hybrid cultivar SK2034H) under saline soil conditions. The hybrid rice cultivar SK2034H was superior to other cultivars in leaf area index, dry matter production (g/m2), number of tillers/m2, number of panicles/m2, panicle length, number of filled grains/panicle, grain yield, straw yield, harvest index and nitrogen, phosphorus and protein content of grains in both seasons and plant height only in the second season. However, Giza 177 gave the heaviest 1000-grain weight. Increasing phosphorus rate from 0 to 36 kg P2O5/ha significantly increased leaf area index, number of tillers/m2, number of panicles/m2, panicle length, panicle weight, number of filled grains/panicle, grain yield and harvest index in the two seasons. However, the highest dry weight/m2, 1000-grain weight, straw yield and N, P and crude protein contents of grains was obtained from application of 54 kg P2O5/ha. There were no significant differences in plant height among phosphorus rates in the two seasons of study. Increasing zinc rate from 0 to 36 kg ZnSO4/ha significantly increased leaf area index, dry matter production, panicle length, panicle weight, 1000-grain weight, grain yield, straw yield, harvest index and N and crude protein contents of grains. The inverse was true in unfilled grains % and phosphorus content of grains. Application of 24 and 36 kg ZnSO4/ha, being insignificant, increased number of tillers/m2, number of panicles/m2 and number of filled grains/panicle compared with control (without zinc fertilizer). Zinc fertilizer rate had no significant effect on plant height in both seasons. All the first and second order interaction had significant effects on grain yield/ha. The maximum grain yield was obtained from the hybrid cultivar SK2034H fertilized by 54 kg P2O5 + 36 kg ZnSO4/ha or 36 kg P2O5 + 24 kg ZnSO4/ha in the two seasons. The highest grain yield of Giza 178 and Sakha104 were obtained by application of 36 kg P2 O5 and 36 kg ZnSO4/ha. It can be concluded that sowing SK2034H rice cultivar and application phosphorus fertilizer at the rate of 54 kg P2O5 /ha and Zinc fertilizer at the rate of 24 or 36 kg ZnSO4 could be recommended to produce optimum grain yield per unit area under saline soil condition. | ||||
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