栽植密度对杂交稻产量的影响  

Effects of Planting Density on Yield of Hybrid Rice

作　　者：周宁宁 阿什日轨 周林 冯婷煜 黄正 张琪 张荣萍[1] 马鹏[1] ZHOU Ning-ning;A Shen-ri-gui;ZHOU Lin;FENG Ting-yu;HUANG Zheng;ZHANG Qi;ZHANG Rong-ping;MA Peng(School of Life Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]西南科技大学生命科学与工程学院,绵阳621010

出　　处：《湖南师范大学自然科学学报》2022年第6期99-107,共9页Journal of Natural Science of Hunan Normal University

基　　金：国家重点研发计划项目(2017YFD0301706)。

摘　　要：为探讨四川丘陵稻区不同栽植密度两系和三系杂交稻产量的变化规律,以8个两系杂交稻品种和8个三系杂交稻品种为试验材料,采用两因素裂区试验设计,以栽植密度(M1:37 cm×30 cm,M2:37 cm×20 cm,M3:37 cm×15 cm,M4:37 cm×12 cm)为主因素,不同类型杂交稻品种为副因素,在大田试验条件下测定杂交稻成穗率和产量。结果表明:在不同密度处理下,两系和三系杂交稻最高茎蘖数随密度增加而增加,而分蘖成穗率则随密度的增加而表现出下降的趋势。两系杂交稻产量随密度增加而增加,三系杂交稻产量随密度增加呈先增后减趋势,在M3处理下最高,在相同密度处理下,两系品种最高茎蘖数比三系品种显著增加10.11%~32.06%,两系品种分蘖成穗率比三系品种增加0.59%~4.38%。两系品种产量比三系品种增加0.52%~6.96%。通过相关性分析发现有效穗数是影响两系和三系杂交稻产量的主要因素。两系杂交稻品种在栽植密度为M4处理下产量最高,三系杂交稻品种在M3处理下产量最高。In order to explore the variation law of two-line and three-line hybrid rice yields at different planting densities in hilly rice area of Sichuan,eight two-line hybrid rice varieties and eight three-line hybrid rice varieties were used as experimental materials,and a two-factor split-plot experimental design was adopted.Planting density(M1:37 cm×30 cm,M2:37 cm×20 cm,M3:37 cm×15 cm,and M4:37 cm×12 cm) is the main factor,and different types of hybrid rice varieties are the secondary factors.The spike rate and yield of hybrid rice were determined under field test conditions.The results showed that under different density treatments,the highest tiller number of two-line and three-line hybrid rice increased with the increase of density,while the tillering panicle rate showed a downward trend with the increase of density.The yield of two-line hybrid rice increased upon the increase of density,and the yield of three-line hybrid rice increased first and then decreased upon the increase of density with the highest under the M3 treatment.Under the same density treatment,the highest number of stems and tillers of the two-line variety was significantly higher than that of the three-line variety.It increased by 10.11%-32.06%,and the tillering and panicle formation rate of two-line varieties increased by 0.59%-4.38% than that of three-line varieties.The yield of two-line varieties increased by 0.52%-6.96% than that of three-line varieties.Through the correlation analysis,it was found that the effective panicle number was the main factor affecting the yield of two-line and three-line hybrid rice.The two-line hybrid rice varieties had the highest yield under the M4 treatment,and the three-line hybrid rice varieties possessed the highest yield under the M3 treatment.

关 键 词：两系杂交稻 三系杂交稻 密度 产量 

分 类 号：S511[农业科学—作物学]