摘要
在定西干旱生态条件下，以陇亚10号胡麻为材料，研究了密度对籽粒灌浆特性和农艺性状的影响。结果表明：随着种植密度的增大，胡麻分枝数、蒴果数减小，株高波动性变化；胡麻籽粒干物质积累过程呈“S”型曲线，可用Logistic模型进行模拟，相关系数达0．99以上，花后6～31 d籽粒干物质积累速度最大；胡麻最大灌浆速率、平均灌浆速率和灌浆持续期均受种植密度的影响，处理间平均灌浆速率差异明显，其中以600万株· hm－2的平均灌浆速率最高，1050万株· hm－2的平均灌浆速率最低；不同密度处理间百粒重和产量存在显著性差异，600万株·hm－2处理的百粒重和籽粒产量最大，显著高于1200万株·hm－2处理。说明在实际生产中要根据不同胡麻品种类型选择最佳的种植密度。
The effect of grain filling characteristics ,the relationships between density and agronomic traits under different planting densities were investigated in Dingxi arid ecological conditions for Longya 10 .The result showed that the branch number ,capsule number were reduced ,while the plant height varied with plant density .The dynamics of dry matter accumulation showed“S”curve of flax grain ,and may be described by Logistic model .The correlation coefficient was more than 0 .99 .The increase of grain quality was largest after flowering 6~31 d .The maximum grain filling rate , mean grain filling rate and grain filling duration time were affected by plant density .The average filling rates among dif-ferent treatments were significant .The filling rate of D3 （6 million· hm-2 ） treatment was the highest ,while the D6 （10 .5 million .hm-2 ） treatment was lowest .The 100-grain weight and grain yield were significantly different under dif-ferent density treatments .The 100-grain weight and grain yield of D3 （6 million·hm-2 ） treatment were maximum com-pared to other treatments ,indicating the necessity of adopting suitable planting density for a given variety of flax .
出处
《干旱地区农业研究》
CSCD
北大核心
2015年第1期176-181,共6页
Agricultural Research in the Arid Areas
基金
国家胡麻产业技术体系定西综合试验站(CARS-17-SYZ-3)
