不同株型玉米冠层光氮分布、衰老特征及光能利用对增密的响应

柏延文,张宏军,朱亚利,郑学慧,杨梅,李从锋,张仁和

Responses of Canopy Radiation and Nitrogen Distribution, Leaf Senescence and Radiation Use Efficiency on Increased Planting Density of Different Variety Types of Maize

BAI YanWen,ZHANG HongJun,ZHU YaLi,ZHENG XueHui,YANG Mei,LI CongFeng,ZHANG RenHe

表1 密度对不同株型玉米衰老特征的影响

Table1 Effects of planting density on senescence characteristics of maize with different plant types

年份 Year 品种 Hybrid 密度 Density (plants/hm2) 方程参数 相关系数 R2 衰老性状参数 b c RGLAm Vm Ts Vmax Tmax 2017 陕单609 Shaandan609 45000 6.654 0.092 0.9852 57.3 0.76 38.3 2.30 72.3 60000 5.884 0.092 0.9912 54.2 0.82 31.8 2.31 63.7 75000 5.344 0.097 0.9952 52.6 0.86 24.7 2.43 54.9 90000 5.123 0.113 0.9758 40.8 1.06 19.3 2.83 45.3 陕单8806 Shaandan8806 45000 4.525 0.084 0.9689 43.0 1.05 18.8 2.10 53.9 60000 4.156 0.093 0.9856 33.4 1.22 13.0 2.33 44.7 75000 3.926 0.114 0.9954 30.4 1.30 8.6 2.85 34.4 90000 3.756 0.125 0.9921 16.7 1.50 6.5 3.13 30.0 2018 陕单609 Shaandan609 45000 6.150 0.088 0.9832 48.1 0.93 36.4 2.20 69.9 60000 5.741 0.092 0.9856 34.9 1.02 30.4 2.30 62.4 75000 5.543 0.098 0.9769 34.8 1.16 26.5 2.45 56.6 90000 5.322 0.110 0.9961 26.9 1.30 21.6 2.75 48.4 陕单8806 Shaandan8806 45000 4.368 0.091 0.9795 43.5 1.26 15.6 2.28 48.0 60000 3.925 0.099 0.9899 35.4 1.15 9.9 2.48 39.6 75000 3.812 0.118 0.9916 21.8 1.40 7.4 2.95 32.3 90000 3.856 0.131 0.9857 15.1 1.59 7.0 3.28 29.4