不同密度下寒地水稻龙粳31库源特征及关系  

Relationship Between the Source and Sink of Rice Cultivar Longjing31 under Different Densities

作　　者：赵黎明[1] ZHAO Li-ming(Rice Research Institute of Heilongjiang Academy of Land Reclamation Sciences,Jiamusi Heilongjiang 154007,China)

机构地区：[1]黑龙江省农垦科学院水稻研究所

出　　处：《北方水稻》2019年第4期5-11,共7页North Rice

摘　　要：试验在大田条件下,以龙粳31为试验材料,设置每穴4株(A1)、5株(A2)、6株(A3)和7株(A4)4个水平及行株距为30 cm×10 cm(B1)、30 cm×12 cm(B2)、30 cm×14 cm(B3)和30 cm×16 cm(B4)4个水平,分析不同密度下寒地水稻干物质积累、叶面积指数和产量构成特征及其关系。结果表明:不同穴株数条件下,A3处理显著增加分蘖盛期和齐穗期干物质积累量,提高蜡熟期叶面积指数和成熟期产量,且产量较其它处理增幅2.34%~10.87%。各时期干物质积累量和叶面积指数随穴株距增加而降低。穴株数与穴株距交互作用下,各处理组合对水稻干物质积累量、叶面积指数、产量及其构成的影响存在明显或显著互作效应,以穴株数6株与行株距30 cm×10 cm处理组合(A3B1)效果最佳,产量达9 291.25 kg·hm^-2。在试验设置密度范围内,产量与抽穗期茎鞘干重、叶片干重、生物产量和成熟期每平方米茎数呈极显著正相关,而与蜡熟期茎鞘干重、单株粒重、每平方米基本苗数和株高均呈二次函数关系。综合分析表明,每穴株数6株与行株距30 cm×10 cm(A3B1)处理组合模式更适合在目前寒地水稻龙粳31高产栽培中应用。The experiment is carried out in the land for growing field crops,and takes Longjing31 as the experimental material.Four levels of four plants(A1),five(A2),six(A3)and seven(A4)per hole and row spacing of 30 cm×10 cm(B1),30 cm×12 cm(B2),30 cm×14 cm(B3)and 30 cm×16 cm(B4)were set up.The dry matter accumulation,leaf area index and yield components of rice were analyzed in different densities.The results showed that A3 treatment significantly increased dry matter accumulation at tillering peak and full heading stage,leaf area index at wax maturity stage and yield at maturity stage,and the yield increased by 2.34%~10.87%compared with other treatments.Dry matter accumulation and leaf area index decreased with the increase of plant spacing.Under the interaction of the number of cave plants and the distance between cave plants,the effects of each treatment combination on dry matter accumulation,leaf area index,yield and its composition of rice were obvious or significant.The combination of 6 cave plants and 30 cm x 10 cm row spacing(A3B1)had the best effect,and the yield reached 9 291.25 kg/hm2.Within the set density range,yield was positively correlated with stem sheath dry weight at heading stage,leaf dry weight,biomass and stem number per square meter at maturity stage,and quadratic function with stem sheath dry weight,grain weight per plant,basic seedling number per square meter and plant height at wax maturity stage.Comprehensive analysis showed that the combination model of 6 plants per hole and 30 cm×10 cm(A3B1)row spacing was more suitable for the current high-yield cultivation of rice Longjing31 in cold regions.

关 键 词：寒地水稻 密度 产量 库源特征 

分 类 号：S511.045[农业科学—作物学]