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我县在古城公社杨村大队杨村片八个生产队,一九七七年晚造集中连片制种11亩,组合为二九南一号A×IR24,平均亩产183.6斤,最高产的一块0.85亩,折亩产324.7斤。他们着重抓四点: 1.确定适宜的播种差期和安全抽穗期他们根据我县一九七五年和一九七六年晚造制种实践,在正常情况下,各品种的生育期比较稳定,二九南一号A与IR24从播种至抽穗的差期为40天左右。从本地具体情况出发,他们安排父母本播种差期为44天。另据
My county in the ancient city commune Yangcun brigade Yangcun eight production teams, in late 1977 made concentrated contiguous seed production of 11 acres, the combination of nine nine South One A × IR24, an average of 183.6 pounds per mu, the highest yield A piece of 0.85 mu, yield 324.7 kg mu. They focus on four points: 1. Determine the appropriate sowing difference and safe heading date According to their county in 1975 and 1976, late seed production practice, under normal circumstances, the growth of each species compared Stable, two nine South No. A and IR24 from sowing to heading the difference of about 40 days. Starting from the local specific situation, they arranged for the parents to sow the difference for 44 days. According to another