根据辽沈Ⅰ型育苗温室内光照、温度和水分蒸发量的连续观测资料,分析该温室内南北向环境条件的日变化规律,由南向北依次设定5等分位点为T1、T2、T3、T4、T5.结果表明,一天内不同时段的环境变化趋势不尽相同.照度的南北水平分布特点是温室南部大于温室北部.温度规律表现为8:00时T3＞T4＞T5＞T2＞T1、10:00至14:00时T4＞T3＞T5＞T2＞T1、16:00时T4=T3＞T5＞T2＞T11、8:00时后至夜间表现出由南向北逐渐升高的递变特点.此外,水分蒸发量各时段变化规律表现一致,均为T2＞T1＞T3＞T4＞T5.观测数据的统计分析和秧苗品质的客观评价显示,南北向综合环境条件的差异对秧苗生长发育及其品质具有重要的影响,且T4位点秧苗综合品质最佳.%According to the continuous observation of radiant intensity, air temperature and water evaporation in Liaoshen type Ⅰseedling greenhouse, the characteristics of daily change were analyzed in five equal loci marked T1, T2, T3, T4 and T5 from south to north. Results showed that there were inconsistent tendencies of microclimatic conditions in different daytime points. The radiant intensity distributed horizontally higher in south than in north. The tendency of air temperature was T3＞T4＞T5＞T2＞T1 in 8:00, T4＞T3＞T5＞T2＞T1 during 10:00 to 14:00, and T4=T3＞T5＞T2＞T1 in 16:00, respectively. But all night long, air temperature rose step by step from south to north.Furthermore, the tendency of water evaporation was T2＞ T1＞T3＞T4＞T5. Statistical analysis and observation of seedling quality indicated that differences of composite microclimatic conditions from south to north in greenhouse had strong effect on growth and quality of tomato seedlings and the seedling in T4 locus grew best.
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