摘要： 为了明确插秧密度和苗数对寒地不同分蘖类型水稻品种群体构成、产量及产量构成因素等的影响,以多蘖型东农428和寡蘖型龙稻5为试材,采用大田裂区试验设计对不同插秧苗数、密度对寒地不同分蘖类型水稻品种群体构成、叶片SPAD值、产量及产量构成因素的影响进行了研究.结果表明:密度对多蘖型东农428分蘖数量影响更大,而插秧苗数对寡蘖龙稻5影响更为明显.密度和插秧苗数对不同类型水稻品种的SPAD值影响较为一致,即栽植密度较小、插秧苗数较少的处理SPAD值较大.龙稻5在插秧数为8,插秧规格为30 cm×12 cm时产量最高,东农428在插秧苗数为8,插秧规格为30 cm×14 cm时产量最高.

关键词: 寒地, 水稻, 分蘖类型, 群体结构, 产量

Abstract: In order to elucidate the density and number of transplanting influence population structure,yield and yield component of different tillering ability rice in cold region.Field experiments with Dongnong 428 and Longdao 5 were carried out under various number of hills per unit area,seedlings per hill.The effect of transplanting number and density on population structure of different tillering type rice were investigated.Our results showed that hills per unit area of transplanting had greater influenced on strong-tillering-ability cultivar Dongnong 428,while seedlings per hill of transplanting had greater influenced on inferior-tillering-ability cultivar Longdao 5.The effect of transplanting number and density on SPAD was the same to the different-tillering-ability cultivars was that the smaller number of hills per unit area and seedlings per hill,the SPAD was bigger.At 8 seedlings/hill and transplanting standard of 30 cm×12 cm,Longdao 5 reached the highest yield in field,while Dongnong 428 reached the highest yield at 8 seedlings/hills and transplanting standard of 30 cm×14 cm.

Key words: Cold region, Rice, Tiller type, Population structure, Yield

中图分类号: 

• S511.03