RICE PRODUCTIVITY AS INFLUENCED BY PLANTING DATES AND SEEDLING AGES | ||||
| Journal of Plant Production | ||||
| Article 5, Volume 25, Issue 3, March 2000, Page 1511-1521 PDF (644.16 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2000.258742 | ||||
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| Authors | ||||
| A. E. Sharief,1; M. H. El-Hinidi1; A. A. Abd El-Rhaman2; G. M. Abdo1 | ||||
| 1Agron. Dept. Fac. of Agric. Mansoura Univ. | ||||
| 2Rice Research and Training Center, Sakha, ARC. | ||||
| Abstract | ||||
| Two field experiments were conducted in extension field at El-Busrate village, El-Manzala Farm, Dakhalia region, during 1998 and 1999 growing seasons. The objectives of this investigation was aimed to study the effect of sown dates (April 25, May 10, May 25 and June 10), seedlings ages (20, 25, 30, 35 and 40 days after sown) and their interaction on growth, yield and yield components of rice Sakha 101 cultivar. A split plot design with four replications was used. The main findings could be summarized as follows: 1- Early sowing date on 10th May successfully improved with marked effect of number of panicles /m2, number of filled grains/panicle, panicle weight, 1000 -grain weight, grain and straw yield/fed over the planting on 25th April. However, late planting on 25th May or 10th June significantly reduced the above mentioned characteristics than the early planting. 2- The seedling age of 30 days old significantly gave higher yield and its components than the older seedlings at 35 or 40 days old or the youngest of 20 or 25 days from sowing. 3- The interaction between planting dates and seedling ages had a significant effect on number of filled grains/panicle in both seasons and straw yield/fed in the first season. Maximum number of filled grains/panicle and straw yield were recorded from planting on May 10 with using seedling 30 days old. 4- The results stated that grain yield/fed showed positive and highly significant correlation coefficients with both plant height, number of filled grains/panicle, number of panicles/m2, panicle weight, panicle/length and 1000-grain weight. 5- Multiple regression analysis showed that plant height (R2 = 35.46 %), panicle length (R2 = 6.25 %) and panicle weight (R2 = 5.85 %) were the most variables affecting grain yield/fed. Stepwise regression analysis indicated that both plant height (R2 = 31.19 %) and panicle weight (R2 = 61.58 %) were accepted as significantly contribution for grain yield/fed. In general, it could be summarized that for obtain highest grain yield production from planting rice on 10th May using seedlings 30 days old of Sakha 101 cultivar under the environmental condition of El-Manzala district, Dakhalia Governorate. | ||||
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