Title: Determination of suitable transplanting date and plant density on yield and yield components, early line rice AN74
Author: Seyed Sadegh Hosseini Emani
Abstract: One of the ways for increasing the income of rice farmers to increasing land productivity. In order to determine appropriate transplanting dates and plant spacing for the rice promising line AN74, field experiments were carried out at the Rice Research Institute of Iran– Deputy of Mazandaran (Amol) during 2017 and 2018. These experiments were laid out as split-plot arrangements based on a Randomized Complete Block Design with 3 replications in 3×4 m plots. The main factor was the transplanting date with three levels (May 11, 21, and June 1) and the subfactor was planting spacing with three levels (16×30, 20×20, and 25×25 cm). Agronomical traits, including plant height, numbers of tillers, length of panicle, number of filled and unfilled grains, grain weight, and economic yield were measured. Results showed that Plant spacing had significant effects on grain yield (P<0.01), and the highest yield (5732 kg/ha) was observed in 20 x 20 cm spacing, but the interaction between transplanting date in Plant spacing didn’t affect yield. The highest grain yield (6103 kg.ha-1) was obtained with 20×20 cm plant spacing. Based on the results, for the AN74 line as a high grain quality line, a planting date of May 12th and plant spacing of 20×20 cm are recommended.
Keywords: Grain Yield, Plant density, Rice