生态学杂志2013，Vol.32Issue(8)：2049-2055,7.
东北地区玉米出苗速度与水热条件的关系及出苗期气象评估
Maize emergence speed and its relationships with water and heat conditions in Northeast China and meteorological assessment of the maize emergence period
摘要
Abstract
In 2010-2011,a two-factor experiment of water stress and sowing date for spring maize (Zea mays) was conducted to reveal the effects of soil moisture and air temperature on the spring maize emergence speed in Northeast China,and to establish the corresponding models for assessing and predicting the maize emergence period.The maize emergence speed had close relationships with the soil moisture and air temperature.The maize emerged faster under the conditions of more sufficient soil moisture and higher air temperature,while delayed under dry weather and low temperature.Under the conditions of the average soil moisture (S) in 0-20 cm layer being 21％-25％,soil available water capacity (H) being 50-70 mm,and average air temperature (T) being 18-20 ℃,the maize emerged about 10 d after sowing; at the S was 18％-21％,H was 30-50 mm,and T was 16.5-18 ℃,the emergence was prolonged to about 18 d; while at the S was ＜18％,H was ＜30 mm,and T was temperature 16.5 ℃,the emergence was prolonged to 25 d,and even,no seedling appeared.The relationships between the interval days from seeding to emergence (D) and the S,H,and T were D=78.017-1.746S-1.642T or D=60.776-0.288H-1.937T.These indicators and models could be applied in the assessment and prediction of the maize emergence period,and in the guidance of drought-resisting activities and weather services.关键词
春玉米/土壤水分/温度/出苗期/评估Key words
spring maize / soil moisture / temperature / emergence time / assessment分类
农业科技引用本文复制引用
马树庆,王琪,于海,徐丽萍,张铁林,纪玲玲..东北地区玉米出苗速度与水热条件的关系及出苗期气象评估[J].生态学杂志,2013,32(8):2049-2055,7.基金项目
国家行业专项"农用天气预报关键技术研究"项目(GYHY200906021)资助. （GYHY200906021）
