Effect of sowing date and method of raising seedlings on rice yield and its components

• Main Authors: El Kalla S.E, Balal M.S, Hindi M.H.E, El Serafy A.M
• Format: Conference Proceeding
• Language: English
• Published: 1989
• Subjects: caracteres de rendimiento; composante de rendement; date de semis; egipto; egypt; egypte; fecha de siembra; oryza sativa; plantulas; plantule; seedlings; sowing date; variedades; variete; varieties; yield components

Rice varieties Giza 172 and Giza 180 were studied for the effect of different sowing dates and methods of raising seedlings on yield and its components. The experiments were conducted at Sakha Agricultural Research Station [Egypt] and the important findings could be summarized as follows: Number of days from sowing to heading gradually decreased from the first planting date on 20 Apr to the last planting date on 5 Jun. The dapog method took the longest sowing-to-heading period; the wet-bed method, the shortest. The dapog sown on 20 Apr took the longest period to heading; the wet-bed sown on the fourth planting date (5 Jun), the shortest sowing date. The treatment combination of the first date of sowing with the dapog method, however, gave the tallest plants for both the varieties. Sowing on 5 May gave the maximum number of tiller per plant. As for the method of planting, the effect varied with the variety, with the dapog method giving the maximum tillers per plant in Giza 180 and the wetbed method in Giza 172. The 5 May sowing also gave the heaviest panicles, and the dapog method gave the highest panicle weight in Giza 172. The highest grain number and straw yield per hectare were obtained with the 5 May sowing for both varieties. Effect of methods of raising seedlings varied with variety, with Giza 172 showing no difference and Giza 180 giving the maximum grain by dapog and the highest straw yield by the wet-bed method. The 5 May sowing in combination with the wet-bed method gave the maximum straw yields per feddan in both the varieties.