基于当量积温的春玉米叶龄模式研究

提前了解玉米叶龄情况,既能使采用叶龄施肥方法的农民提前做好准备,也能了解玉米穗分化的情况,对玉米田间管理有重要意义,为更好的实现精准农业管理提供一种方法。基于2012—2014年佳木斯农气站、梨树农气站、榆树农气站的春玉米每年5个大田分期播种试验资料,应用当量积温模式分析春玉米出苗期—抽雄吐丝期叶龄与当量积温的关系。结果表明：通过上述研究建立春玉米叶龄生长模式,实现玉米叶片生长的定量模拟。模型结果很好地通过显著性检验。在不发生干旱的情况下,可以用该模型模拟黑龙江和吉林地区‘先玉335’的叶龄,也可根据天气预报预测未来该品种春玉米叶龄。

Leaf Age Model of Spring Maize Based on Equivalent Accumulated Temperature

To know the leaf age condition of maize in advance, can not only make the farmers prepare in advance for using leaf age fertilization, but also clarify the ear differentiation of maize, which is of great significance for precise field management in maize production. Based on the experimental data of five spring maize field tests from 2012 to 2014 in Jiamusi, Lishu and Yushu station, the relationship between leaf age and equivalent accumulated temperature was analyzed by using equivalent accumulated temperature model. The leaf age growth model of spring maize was established to realize the quantitative growth of maize leaf simulation. The model passed the significance test well. Under the condition of no drought, the model could be used to simulate the leaf age of ‘Xianyu 335’ in Heilongjiang and Jilin, and predict the leaf age of spring maize according to weather forecast.