摘要
种植密度是高产的重要因素,群体密度对冠层光合特性与产量密切相关,以淄蓖麻7号为供试品种,设置了5个密度处理:0.90万、1.05万、1.20万、1.35万、1.50万株/hm2,测定并计算各生育期的株高、叶面积系数、净同化率和产量指标,结果表明:1.20万株/hm2的密度处理表现最好,果实成熟期的株高228.37 cm,叶面积系数2.28,叶片净同化率5.19g/(m2.d),株穗数5.33穗、穗粒数125.25粒、百粒重46 g,产量最高,为3685.06 kg/hm2。因此,蓖麻中熟品种的适宜密度为1.20万株/hm2左右。
Planting density is an important factor for high yield , and population density is closely correlated with the canopy photosynthetic characteristics and yield .Zibima No.7 was used as the tested variety of castor -oil plant, 5 kinds of planting density treatments were designed, including 9000, 10500, 12000, 13500 and 15000 plants/hm 2 , and the plant height, leaf area coeffi-cient, net assimilation rate and yield index at each growth stage were determined and calculated .The results showed that:12000 plants/hm 2 was the best planting density;in this treatment, the plant height at fruit maturation stage was 228.37 cm, the leaf area coefficient was 2.28, the leaf net assimilation rate was 5.19 g/(m 2? d), the number of spike per plant was 5.33 spikes, the num-ber of grain per spike was 125.25 grains, the 100-seed weight was 46 g, and the seed yield was the highest (3685.06 kg/hm 2 ). Thus, the suitable planting density of middle -mature castor-oil plant variety was about 12000 plants/hm 2 .
出处
《江西农业学报》
CAS
2013年第7期13-16,共4页
Acta Agriculturae Jiangxi
基金
贵州省科研院所创新能力建设项目"贵州省生物质能源植物研发创新能力建设"[黔科合院所创能(2010)4007号]
贵州省农科院(院专项)"能源植物蓖麻品种选优及配套栽培技术研究"[黔农科院院专项(2010)014号]
关键词
高原山区
蓖麻
密度
叶面积指数
净同化率
Plateau mountainous area
Castor-oil plant
Planting density
Leaf area index
Net assimilation rate
作者简介
田大清（1956-），男，贵州兴义人，农艺师，从事能源油料作物研究。
