冬小麦植株地上部与地下部有关性状间的相关性研究Ⅰ．生育前期和中期性状间的相关性分析

Studies on the Correlations between Characters of Roots and Those of Aerial Parts of Winter Wheat in Northern China I Correlations between Characters of the Roots and Aerial Parts from Seeding Time to Heading Stage

通过对冬小麦生育前期及中期根系６个性状和植林地上部１０个性状间相关关系的系统研究，明确了判断根系有关性状的地上部指标顺序：冬前和冬季阶段是单株绿叶数＞单株分蘖数＞株高，返青起身阶段是单株分蘖数＞单株绿叶数＞株高，拔节挑旗阶段是单株分蘖数＞株高＞单株绿叶数。单株干重和鲜重也是各阶段判断根系性状的重要参考指标。

Correlations between the characters of roots and those of aerial parts of winterwheat were systematically studied during the developmental period from seeding time toheading stage in 1990─1991. The experiment demonstrted the characters of aerial partsof the plant which could indicate those of the roots. The characters were as follows: theywere number of green leaves and tillers per plant,plant height before and during the win-ter; number of tillers and green leaves per plant,plant height from returing green stage toelongation stage;number of tillers, plant height,number of green leaves per plant from e-longation stage to heading stage. Moreover,heavy dry and fresh biomass(except roots)perplant also marked the flourishing root system from seeding time to heading stage.