高寒牧区燕麦生产性能的初步分析

在青藏高寒牧区进行１３个燕麦品种的比较试验，方差分析和新复极差测验结果表明，品种间产草量差异显著，基中加拿达，甜燕麦，８７－４４４等品种明显高于当地农家品种黄燕麦。对参试品种的平均单蘖重与单蘖叶重，单蘖茎重，单蘖穗重，株高，秆径和单株分蘖数的回归分析结果，建立经ｔ测验回归系数显著的一组回归方程，尤以单蘖茎重与单蘖重的关系最为密切，相关系数达０．９９１３。

A Preliminary Analysis of Production Performance of Oat (Avena sativa) at Alpine Meadow Pasture

One comparative test of oats production performances was carried out at Haibei research station of alpine meadow ecosystem,which is located in Qinghai - Xizang (Tibatan) plateau, during growing season in 1993. A random block design with 3 replications was used. The twelve varieties that were introducted by this experiment had gained higher yields than that of Yellow oat which is a major localvariety. The differences of fresh yields among those oats were significant, which were proved by variance analysis and SSR test. These twelve varieties can be planted in this area extensively, but only sowing for harvested sohilage is suitable. The regression analysis between single tiller weight and other charters of oata in this test, Besides the leaves weight of single tiller, were all performed. The regression equations about the single tiller weight with the single spike weight, the single stem weight, the mean height of plants, the mean stem diameter and the tiller numbers of a plant were built. The regression coefficients of these equations were significant by t - test. The single stem weight was the largest part in the single tuller weigh. This was an important character in all performances of the oats. The comparisoion results of the high growth rates and the increase of rates of biomass in oat with some perennial gramineous grasses thatwere planted at the experimental area indicated that the former was significantly highe than the latter,thus, the higher accumulated yield of these varieties were obtained, thes was another important character in all performences of oat.