钵体苗盘外盘根现象的试验研究

对秧盘底孔分别与PVC塑料、玻璃、牛皮纸、泡沫材料、泥土接触情况下,进行了育秧试验.试验表明:在与秧盘底孔有接触物条件下,秧苗都产生了不同程度的盘根现象:而在无任何接触的情况下,包括秧盘底孔无水滴积聚,则无盘根现象发生.同时,对秧苗在有盘根和无盘根情况进行了拔出力试验.试验结果说明,盘根现象使秧苗拔出过程延长,对最大拔出影响不大.

Experimental Research on Root Intertwisting Phenomena outside Seedling Plate

During the seedling raising experiment, the bottom of the seedling plates is kept contact with PVC, glass, kraft paper, foam and clay respectively. The experimental result shows that seedlings have root intertwisting phenomena outside seedling plate to some extent when the seedling roots contact any thing. When there is nothing to contact with the bottom of the seedling plate, including there is not water accumulation, seedlings will have no root intertwisting phenomena outside seedling plate. By the way, the pulling out force of seedling with and without root intertwisting phenomena outside seedling plate is test. The result shows that root intertwisting phenomena outside seedling plate will prolong the pulling out process, but it plays very small part to the maximum pulling out force.