青稞高产栽培技术研究

The Study on High-yield Culture Technique of Highland Barley

对10个高产青稞品种(系)进行三个施肥水平和两个播种密度的高产栽培试验,对其进行产量方差分析,结果表明播种量为24万/亩,施肥水平为施肥水平1(N:7.5千克/亩,P:5千克/亩)产量最高。对株高、总分蘖数、有效分蘖数、穗长、总小穗数、结实小穗数、单穗重、千粒重、基本苗、亩穗数等主要农艺性状进行与产量间的相关和通径分析,结果表明株高与亩产量间的相关系数、偏相关系数均最大,有效分蘖数、千粒重分别与亩产量也存在极显著简单相关性,成穗数、有效分蘖数与亩产量呈极显著正偏相关,与基本苗呈显著正偏相关,而与穗长呈极显著负偏相关。株高和穗长对亩产量有较大的直接通径系数,而穗长通过株高对亩产量有较大的间接通径系数。

For 10 varieties, three levels of fertilization and two kinds of planting density were applied in this test. The result shows the planting density of 3.6million/ha and the fertilization level of （N：112.5kg/ha, P ：75kg/ ha） were the best planting density and fertilization level respectively. The results of correlation analysis and partial correlation analysis indicates that the coefficient of correlation between plant height and yield, valid tiller and yield, weight per thousand seeds and yield were significant ; the coefficient of partial correlation between number of spikes and yield, number of valid tiller and yield, number of seedling and yield, spike length and yield were significant. The result of path analysis indicates that plant height and length of spike significantly contribute to yield directly and indirectly.