水直播稻与插秧稻群体茎秆形态差异分析  

Analysis of Stem Morphological Difference between Direct Seeding Rice and Transplanting Rice

作　　者：赵海新[1] ZHAO Hai-xin(Rice Research Institute of Heilongjiang Academy of Agricultural Sciences,Jiamusi Heilongjiang 154007,China)

机构地区：[1]黑龙江省农业科学院水稻研究所,黑龙江佳木斯154026

出　　处：《北方水稻》2022年第2期10-14,共5页North Rice

基　　金：国家重点研发计划项目(2018YFD0200200,2016YFD0300504)。

摘　　要：为了明确寒地稻作区水直播稻地上茎秆形态的变化,本研究对适合黑龙江省三、四积温带栽培的10个水稻品种,进行了插秧和水直播两种栽培技术试验。试验结果表明:栽培方式造成水稻生长过程中群体竞争压力不同,最终影响稻株茎秆外观和各节位的形态。水直播稻因竞争生长,株高高于插秧稻,且茎秆变细,茎秆第三、四节位平均长度显著大于插秧稻,是造成生产中发生茎秆折断性倒伏的不利指标;相对于插秧方式,水直播对茎秆第二和第三节粗产生显著影响,节粗变细;水直播稻节间粗相对插秧稻下降,其中第四节间下降达极显著水平;第四节的节与节间粗直径比显著高于插秧稻,是增强抗折性的有利指标。In order to clarify the morphological changes of aboveground stem of direct seeding rice in cold region,the experiment of transplanting and direct seeding were carried out on 10 rice varieties suitable for cultivation in temperate zone of Heilongjiang Province.The results showed that the cultivation methods caused different competitive pressure in the process of rice growth,and ultimately affected the appearance of stem and the shape of each node because of the competitive growth,the plant height of sowing rice is higher than that of transplanting rice,and the stem becomes thinner,and the average length of the third and fourth nodes of stem is significantly larger than that of transplanting rice,which is an unfavorable index for the occurrence of stem breaking lodging in production;compared with the transplanting method,the water direct seeding has a significant effect on the coarse yield of the second and third nodes of stem,and the node diameter becomes thinner;the internode diameter of water direct seeding rice is lower than that of transplanting rice,and the fourth node diameter is lower The ratio of node diameter to internode diameter of the fourth node was significantly higher than that of transplanting,which was a favorable index to enhance the folding resistance.

关 键 词：水稻 水直播 插秧 群体竞争 茎秆 形态 

分 类 号：S511.045[农业科学—作物学]