施氮量对宁夏引黄灌区麦后复种糜子生长、产量及氮素利用的影响

谢呈辉, 马海曌, 许宏伟, 徐郗阳, 阮国兵, 郭峥岩, 宁永培, 冯永忠, 杨改河, 任广鑫

Effects of nitrogen rate on growth, grain yield, and nitrogen utilization of multiple cropping proso millet after spring-wheat in Irrigation Area of Ningxia

XIE Cheng-Hui, MA Hai-Zhao, XU Hong-Wei, XU Xi-Yang, RUAN Guo-Bing, GUO Zheng-Yan, NING Yong-Pei, FENG Yong-Zhong, YANG Gai-He, REN Guang-Xin

表3 各生育时期糜子地上部氮素积累量与根系形态、干物质积累量的相关性(2019-2020)

Table 3 Pearson’s correlation coefficients between N accumulation in aboveground and root growth parameters of proso millet at the key growth stages in 2019 and 2020 (n=30)

地上部氮素积累量 N accumulation of above-ground part 拔节期 Jointing 抽穗期 Heading 灌浆期 Grain-filling 成熟期 Maturity 总根长 Total root length 0.671** 0.694** 0.701** 0.720** 总根表面积 Total root surface 0.730** 0.747** 0.707** 0.278ns 总根体积 Total root volume 0.745** 0.563** 0.661** 0.286ns 根平均直径 Root average diameter 0.640** 0.352ns 0.499** 0.319ns 根干物质 Root dry matter 0.712** 0.904** 0.791** 0.550**