不同熟期夏玉米品种籽粒灌浆与脱水特性及其密度效应

万泽花,任佰朝,赵斌,刘鹏,董树亭,张吉旺

Grain Filling and Dehydration Characteristics of Summer Maize Hybrids Differing in Maturities and Effect of Plant Density

Ze-Hua WAN,Bai-Zhao REN,Bin ZHAO,Peng LIU,Shu-Ting DONG,Ji-Wang ZHANG

表5 不同熟期夏玉米品种的籽粒脱水速率

Table 5 Dehydration rate of summer maize hybrids differing in maturities

品种 Hybrid 种植密度 Plant density (plants hm-2) 吐丝后 有效积温 EATAS (°C) 吐丝到籽粒最大含水量时的有效积温 EATSMGWC (°C) 籽粒最大含水量 时的含水率 GMCMWC (%) 生理成熟时的 籽粒含水率 GMCPM (%) 籽粒最大含水率时到 成熟时的脱水速率 DRMGWCPM (% °C-1) 总脱水速率 TDR (% °C-1) 2016 DH518 60000 921.5 437.3 60.7 30.1 0.063 b 0.065 b 75000 916.6 419.2 59.8 29.5 0.061 bc 0.066 b 90000 916.6 419.2 59.9 29.3 0.062 bc 0.066 b HZ8 60000 863.1 399.7 59.1 27.4 0.068 a 0.073 a 75000 863.1 399.7 60.6 27.2 0.072 a 0.073 a 90000 873.2 399.7 60.1 26.8 0.070 a 0.072 a ZD958 60000 951.2 574.0 49.6 31.1 0.049 fg 0.062 cd 75000 951.2 574.0 48.6 30.4 0.048 g 0.063 cd 90000 943.4 554.1 50.5 31.0 0.050 fg 0.063 cd DH605 60000 986.8 574.0 53.5 31.6 0.053 ef 0.059 e 75000 975.9 554.4 52.5 29.1 0.056 de 0.062 d 90000 959.7 538.2 52.7 28.4 0.058 cd 0.064 bc 2017 DH518 60000 933.3 463.6 58.6 27.9 0.065 b 0.067 d 75000 933.3 463.6 59.7 28.2 0.067 bc 0.066 de 90000 927.7 444.0 58.9 25.9 0.068 bc 0.069 b HZ8 60000 920.1 463.6 58.5 28.1 0.067 bc 0.067 cd 75000 920.1 463.6 58.8 26.9 0.070 a 0.069 bc 90000 895.0 425.4 56.9 25.2 0.067 bc 0.072 a ZD958 60000 963.2 544.3 50.8 29.6 0.051 e 0.063 g 75000 963.2 544.3 49.0 27.5 0.051 e 0.065 ef 90000 955.8 530.2 48.5 28.5 0.047 f 0.064 f DH605 60000 970.0 544.3 50.5 26.1 0.057 d 0.066 def 75000 955.8 530.2 50.8 26.3 0.058 d 0.067 d 90000 962.6 530.2 50.0 25.7 0.056 d 0.067 d