影响蒙古岩黄蓍结实量因子的研究

Factors Affecting Hedysarum mongolicum Bearing Fruit Quantities.

对三种沙地类型草场飞播蒙古岩黄蓍结实量的测定结果表明，沙地类型决定着蒙古岩黄蓍结实量的高低，相对高度１～３ｍ的平缓沙丘地适宜建立种源基地；蒙古岩黄蓍的结实枝高（Ｘ１）与结实量（Ｙ）呈负相关，而结实枝数（Ｘ２）、株高（Ｘ３）、节数（Ｘ４）、侧枝数（Ｘ５）和地径（Ｘ６）与结实量呈正相关；Ｘ２、Ｘ６是测定其结实量和选种、育种的主要性状指标，结实直线复回归方程为Ｙ＝－２．６２＋０．０４Ｘ２＋７Ｘ６。

Through determining three kinds air seeding Hedysarum mongolicum bearing fruit quantities in sandy type grasslands, the results showed that sandy type decided the yield of Hedysarum mongolicum bearing fruit quantities. The low gradient sand dune types which are 1～3m in height are suitable to establish base of seed plant. The height of the bearing fruit branch (X 1) was negotively related to bearing fruit quantity (Y), the number of the bearing fruit branch (X 2), the height of nursery stock (X 3), the number of node (X 4), the number of lateral branch (X 5) and diameter of earth (X 6) were positively related to Y. X 2、X 6 were the main character indexes for determining the bearing fruit quantities breading. The linear compound regression equation of bearing fruit was: Y=-2.62+0.04X 2+7X 6.