不同播种密度对南繁青稞产量及农艺性状的影响

Effect of Different Planting Density on Off-season Breeding Highland Barley Yield and Agronomic Characters

本文设在云南省元谋县青稞南繁基地,于2018年研究了播种密度[T1:75.00 kg/hm^2、T2:112.50 kg/hm^2、T3:150.00 kg/hm^2、T4:187.50 kg/hm^2]对青稞品种藏青17、13-6927及藏青13产量及农艺性状的影响,主要研究结果如下:①播种密度为150.00kg/hm^2下,青稞品种藏青17、13-6927及藏青13的产量提高最明显。较T1处理,T3处理下藏青17、13-6927及藏青13产量分别提高29.45%、31.65%和55.09%;②适当的提高播种密度显著提高青稞的基本苗、亩穗数;但较高的密度下青稞株高、有效分蘖、千粒重明显降低。较T1处理,T3处理下藏青17、13-6927及藏青13的亩穗数提高最明显,分别为:18.94%、19.91%、16.65%;T4处理下藏青17、13-6927及藏青13的千粒重下降最明显,分别为:1.20%、2.54%、4.08%。

The present study was carried out in off-season breeding base Yuanmou county,Yunnan province,the effects of seeding density[T1:75.00 kg/hm^2,T2:112.50 kg/hm^2,T3:150.00 kg/hm^2,T4:187.50 kg/hm^2]on yield and agronomic traits of barley varieties zangqing17,13-6927 and Zangqing13 were examined in 2018.The main findings are as follows:(i)The planting density was 150.00 kg/hm^2,the yield of barley varieties Zangqing 17,13-6927 and Zangqing13 were increased significantly.Compared with T1 treatment,T3 treatment increased the yield of Zangqing 17,13-6927 and Zangqing13 by 29.45%,31.65%and 55.09%,respectively.(ii)The planting density and the basic seedling and ear number of acre of highland barley were increased significantly;However the plant height,effective tiller and 1000-grain weight of the highland barley decreased significantly at higher density.Compared with T1 treatment,T3 treatment increased significantly the ear number per acre of Zangqing 17,13-6927 and Zangqing13 by 18.94%,19.91%and 16.65%,respectively.Under T4 treatment the 1000-grain weight of Zangqing 17,13-6927 and Zangqing13 were decreased significantly by 1.20%,2.54%and 4.08%,respectively.