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利用西藏生产上种植的11个春青稞品种(系)春播的试验资料,对其产量及产量构成因素进行相关和通径分析。结果表明:产量构成因素与产量相关显著,其相关系数为:千粒重(r2y=0.7900)>穗粒数(rly=0.6476)>有效穗数(r3y=-0.2119);直接通径系数为:千粒重(P2y=0.6587)>穗粒数(Ply=0.4539)>有效穗数(Ply=0.1847)。根据分析及结合西藏拉萨地区青稞生态条件的特点,提出了拉萨地区春播青稞高产育种应增加千粒重、稳定穗粒数、降低有效穗数(即分蘖数);春播青稞高产栽培应适当降低分蘖数。
Based on the spring sowing test data of 11 spring chrysanthemum varieties planted in Tibet production, correlation and path analysis were conducted on the yield and yield components. The results showed that the yield components were significantly correlated with the yield. The correlation coefficients were as follows: 1000-grain weight (r2y = 0.7900)> spikelets per spike (rly = 0.6476)> effective spikes (r3y = -0.2119) P2y = 0.6587)> number of spikelets (Ply = 0.4539)> number of effective spikes (Ply = 0.1847). According to the characteristics of the ecological conditions of barley in Lhasa, Tibet, it is suggested that high-yielding spring barley should increase 1000-grain weight, stabilize grains per spike and decrease effective spike number (ie tillering number) in high-yielding spring barley in Lhasa.