基于气候和青稞产量形成关键指标的青藏高原生态区划分析

为探究青藏高原地区间影响青稞产量的主要因素和对青藏高原青稞种植区进行生态区划，以15个青藏高原主推青稞品种为试验材料，选取9个具有代表性的地区连续两年进行种植，测定株高、平均生育期、千粒重等8个青稞农艺性状，同时收集了9个地区的日照时数、降水量、温差等8个气象因素数据，利用相关性分析、单因素方差分析、隶属函数分析对被测指标进行统计分析。结果表明，平均生育期、千粒重、月均最低温度和温差与青稞产量显著相关，且在9个地区中均存在差异。通过聚类分析将9个地区划分为4个青稞种植生态区，分别为高寒旱作青稞生态区、柴达木盆地灌溉青稞生态区、河谷非饱灌青稞生态区和农林混合山地青稞生态区，其中高寒旱作青稞生态区综合表现最好。利用隶属函数分析对9个地区进行综合评价，其中贵南综合评价得分最高，且不同生态区均存在优势青稞品种。

Analysis of Qinghai-Tibet Plateau Ecological Regionalization Based on Key Indicators Formed by Climate and Hulless Barley Yield

In order to explore the main factors affecting the yield of hulless barley among the Qinghai-Tibet Plateau regions, and to carry out ecological division of the hulless barley planting areas on the Qinghai-Tibet Plateau, 15 hulless barley varieties of the Qinghai-Tibet Plateau were selected as test materials, and planted atnine representative regions for two consecutive years. Eight agronomic traits of hulless barley, such as plant height, average growth period, and thousand-grain weight were measured. Eight meteorological factors were collected in the nine regions:sunshine hours, rainfall and temperature difference, etc. Correlation analysis, one-way ANOVA, and membership statistical analysis were performed on the measured indicators by function analysis, and four agronomic and meteorological factors, including average growth period, thousand grain weight, average minimum temperature, and temperature difference, were significantly correlated with yield, with differences in the nine regions. The nine regions were divided into four hulless barley planting regions by cluster analysis, namely, cold and arid ecological region, qaidam basin ecological region, river valley unsaturated ecological region, and agroforestry mountainous ecological region,among which the cold and arid ecological region had the best comprehensive performance. The membership function analysis was used to conduct a comprehensive evaluation of the nine regions, among which Guinan was evaluated with the highest comprehensive evaluation score. The dominant hulless barley varieties foreach ecological area were screened.