摘要
利用甘肃省西峰农业气象试验站1994-2008年玉米试验田观测资料及同期西峰国家基准气候站气象资料,建立了基于玉米生长发育期温度适宜性评价光能利用率的辐热积计算方法,分析了试验年份内光照、温度的分布特征及辐热积对玉米生长发育及各组织器官干物质累积的影响。结果表明：自20世纪90年代中期以来,陇东玉米生长期的积温呈逐年增加趋势,太阳辐射呈逐年减少趋势。各年份间全生育期内辐热积变化不大,但出苗期-三叶期及乳熟期-成熟期的辐热积差异较大。七叶期-拔节期、抽雄期-乳熟期及出苗期-三叶期的温度适宜性最好,太阳辐射的利用率较高;拔节期-抽雄期、乳熟期-成熟期太阳辐射利用率较低。拔节期-抽雄期的辐热积与同期叶片干物重、乳熟期-成熟期辐热积与同期茎干物重、抽雄期-乳熟期辐热积与同期穗干物重相关性均通过了信度为0.1的假设检验。这些时段的辐热积是影响玉米植株主要组成组织器官干物质累积的主要因子。
Based on data of maize in test field in Xifeng Agrometerological Experiment Station and meterological data of Xifeng National Base Climatic Station from 1994～2008,the model of TEP（thermal effectiveness photosynthetically active radiation） was set up to assess the degree of utilization of solar radiation,and the impact of solar radiation,temperature and TEP distribution on the growth and accumulation of biomass of maize was analyzed.The results showed that the trend of accumulated temperature turned to increase and solar radiation to decrease during the maize＇s growth period since the mid 1990s.The difference of TEP was small among 15 years but it showed big difference in seeding stage to three leaves stage and milky maturity stage to maturity stage.The suitability of temperature kept in high level during seven leaves stage to jointing stage,tasseling stage to milky maturity stage and seeding stage to three leaves stage and kept in low level during jointing stage to tasseling stage,milky maturity stage to maturity stage.The correlation coefficient between the value of PET and biomass of leaves in jointing stage to tasseling stage,biomass of stack in milky maturity stage to maturity stage,biomass of ear in tasseling stage to milky maturity stage passed the reliability of 0.1 of hypothesis test.It showed that the value of PET in these growth stages is the main factor of influence to the biomass of all organs of maize.
出处
《干旱地区农业研究》
CSCD
北大核心
2010年第6期243-247,共5页
Agricultural Research in the Arid Areas
基金
甘肃省气象局“十人计划”
国家科技部公益行业专项(GYHY200806021)
关键词
玉米
辐热积
干物重
陇东
maize
thermal effectiveness of photosynthetically active radiation
biomass
eastern Gansu
