CAJ | 학술논문

为研究郑单958在东北地区的生态适应性,确定其适宜的种植区域,充分发挥郑单958的生产潜力,本文以当地主栽品种为对照,在北纬40°～48°、≥10℃活动年积温在2 916～4 380℃的东北玉米产区开展了郑单958的多点联网试验.结果表明,在东北春玉米区,吐丝至完熟期热量和降水与纬度呈极显著负相关,郑单958的生育进程和产量因各地光热条件不同而表现出较大差异.其中,从播种到完熟/收获的全生育期天数、千粒重、产量均随纬度先增后减,出苗天数和出苗至吐丝天数随纬度北移而延长,吐丝至成熟天数随纬度升高而缩短.各试验点穗粒数与生态条件无显著关系,千粒重随纬度升高先增后减.郑单958高产主要出现在≥10℃活动年积温在3 450-3 700℃地区,当≥10℃活动年积温约低于3200℃时,不能正常生理成熟,千粒重明显下降.东北春玉米区气候条件差异显著,气象生态条件对郑单958千粒重的影响显著大于对穗粒数的影响,千粒重不同导致其在各地呈现不同的产量表现.在高纬度的低热量地区,造成郑单958减产的主要因素是吐丝至收获期的热量匮乏,依据郑单958对≥10℃活动年积温的响应制定了安全种植北界线,可为其安全推广提供参考.
위연구정단958재동북지구적생태괄응성,학정기괄의적충식구역,충분발휘정단958적생산잠력,본문이당지주재품충위대조,재북위40°～48°、≥10℃활동년적온재2 916～4 380℃적동북옥미산구개전료정단958적다점련망시험.결과표명,재동북춘옥미구,토사지완숙기열량화강수여위도정겁현저부상관,정단958적생육진정화산량인각지광열조건불동이표현출교대차이.기중,종파충도완숙/수획적전생육기천수、천립중、산량균수위도선증후감,출묘천수화출묘지토사천수수위도북이이연장,토사지성숙천수수위도승고이축단.각시험점수립수여생태조건무현저관계,천립중수위도승고선증후감.정단958고산주요출현재≥10℃활동년적온재3 450-3 700℃지구,당≥10℃활동년적온약저우3200℃시,불능정상생리성숙,천립중명현하강.동북춘옥미구기후조건차이현저,기상생태조건대정단958천립중적영향현저대우대수립수적영향,천립중불동도치기재각지정현불동적산량표현.재고위도적저열량지구,조성정단958감산적주요인소시토사지수획기적열량궤핍,의거정단958대≥10℃활동년적온적향응제정료안전충식북계선,가위기안전추엄제공삼고.
Zhengdan 958 has been the leading maize (Zea mays L.) hybrid in resent years. In order to study its ecological adapta-bility and fully exert its potential productivity, we conducted a group of field experiments at 22 sites with the latitude ranged from N 40°07' to N 48°08' and annul ACT from 2 916 to 4 380℃ in Northeast of China where spring maize were largely grown. The result showed that there were significantly negative correlation between ACT, precipitation and latitude in the post-silking stage (P<0.01).The hybrid grain yield showed a difference with growth process due to the variable thermal conditions. The grain yield,1000-kernal weight, entire growth days obeyed a quadratic relationship (P<0.05), with the latitude ascending, the days of emer-gence were increased and the days from silking to physiological maturity or harvest were decreased. In addition, there was no any significant correlation between latitude and kernel number. The highest potential yield of Zhengdan 958 occurred in some areas where ACT was from 3 450-3 700℃. Zhengdan 958 may not be safely physiological matured where ACT was less than 3 200℃and its kernel weight also decreased fast. The study also showed that meteor-ecological environment has a more significant effect on 1000-kernal weight than on kernel number of Zhengdan 958 under the varied northeastern weather conditions. Therefore, dif-ferent 1000-kernel weight might result in different grain yields in this region. The thermal deficiency in post-silking stage is the leading limit factor in those regions with high latitude and lower temperature where maize yield is lower than that in other areas. A map of the north line for safetly planting the Zhengdan 958 in Northeast was made based on ACT.