机插密度和穗肥减量对优质食味水稻品种籽粒淀粉合成的影响

陈云, 刘昆, 张宏路, 李思宇, 张亚军, 韦佳利, 张耗, 顾骏飞, 刘立军, 杨建昌

Effects of machine transplanting density and panicle nitrogen fertilizer reduction on grains starch synthesis in good taste rice cultivars

CHEN Yun, LIU Kun, ZHANG Hong-Lu, LI Si-Yu, ZHANG Ya-Jun, WEI Jia-Li, ZHANG Hao, GU Jun-Fei, LIU Li-Jun, YANG Jian-Chang

表2 优质食味水稻品种获得最低直链淀粉含量时的机插密度(2018年)

Table 2 Machine transplanting density of good taste rice cultivars with minimum amylose content in 2018

品种 Cultivar 机插密度(x, ×104穴 hm-2)与直链淀粉含量(y, %)关系方程 Equation between machine transplanting density (x, ×104 hills hm-2) and amylose content (y, %) R2 xopt1 (x, ×104 hills hm-2) xopt2 (x, cm) ymin (%) 南粳9108 Nanjing 9108 y=0.011x2-0.657x+21.5 0.912 29.9 11.1 11.7 南粳5055 Nanjing 5055 y=0.012x2-0.659x+19.7 0.915 27.5 12.1 10.7 南粳46 Nanjing 46 y=0.012x2-0.674x+20.8 0.966 28.1 11.9 11.3