几年来,我区汕优6号杂交水稻制种获得了较好的收成,纯度均达到部颁一级良种标准。主要的技术措施: 1.定准差期,确保花遇。从汕优6号组合父母本抽穗扬花期对温湿度的要求及山区自然条件的特点看,影响制种产量的主要因素是雨日、雨量和温度。因而确定:海拔200米左右制种的理想抽穗扬花期为8月中旬。海拔每升高100米,抽穗扬花期就提 Over the past few years, my area Shanyou hybrid rice hybrids obtained better harvest, purity reached the ministerial level a seed standard. The main technical measures: 1 set the margin, to ensure spend. From the combination of Shanyou 6 parent flowering and plucking flowering temperature and humidity requirements and characteristics of the natural conditions in mountainous areas, the main factors affecting seed production yield is the rain, rainfall and temperature. Thus determine: about 200 meters above sea level the ideal heading and flowering period in mid-August. Elevation for each elevation of 100 meters, heading flowering period to mention