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1选地,隔离,种植方式及管理技术1.1选地制种地块要求土层深厚,土质肥沃,地势平坦,排灌方便,无检疫病虫害,集中连片,成方种植。制种田地头必须设置标牌,写清种植户姓名、组别及面积。1.2安全隔离玉米制种田与异品种玉米田边界垂直空间隔离带不少于200m,东、西、北三面(或上风头)不少于300m。春播制种或自交系繁殖时间间隔要求与异品种玉米田播期错期40d,夏播制种田要求错期30d。制种田如无村庄、树林、河堤、山岗、沙丘等条件,高秆作物隔离带宽度
1 Selection, isolation, planting methods and management techniques 1.1 Selection of seed production plots require deep soil, fertile soil, flat terrain, irrigation and drainage convenience, no quarantine pests and diseases, concentrated contiguous, into square planting. Farming system must be set signs signs, write down the growers name, group and area. 1.2 Safe isolation Maize farming and different varieties of cornfield vertical space isolation zone of not less than 200m, east, west and north sides (or the limelight) of not less than 300m. Spring planting or inbred lines breeding interval requirements and different varieties of corn sowing period of 40d, summer sowing requirements of the wrong period 30d. Farming without village, woods, embankments, hills, dunes and other conditions, the height of stubble isolation zone