漂浮育苗对无籽西瓜幼苗生长的影响

为解决三倍体西瓜种子萌发率低和苗期生长缓慢的问题，以无籽西瓜品种红小玉为材料，采用固体基质和引发剂结合进行种子引发处理，利用基质／营养液漂浮育苗，以传统营养钵育苗方法为对照，对西瓜幼苗素质进行了研究。结果表明：采用漂浮育苗，在2叶1心期前，其出叶速度与传统营养钵育苗基本相同，2叶1心期后，漂浮育苗的幼苗生长速度明显超过CK，株高、叶宽、茎粗、根长和鲜重均显著高于CK，根系活力、CAT活性在2叶1心期后都显著高于CK。表明漂浮育苗具有明显的壮苗效果。

Effect of Floating Nursing Seedling in Water- bed on Seedling Growth in Seedless Watermelon

In order to solve the problems of low seed gernfination and slow seedling growth for triploid watermelon, the seedling quality of seedless watermelon variety Hongxiaoyu was studied by means of the solid matrix priming treatment and matrix / floating nursing seedling on tile nutrient waterbed, using the traditional method of nutrition pot nursing seedling as the control. The results showed that the leaf emergence of the floating nursing seedling was the same as that of the tradi- tional nursing seedling before 2 leaves stage, but after 2 leaves stage, the seedling growth of floating nursing seedling obvi- ously exceed the CK, and the plant height , blade width, stem diameter, root length , fresh plant weight as well as the root vigor and CAT activity were all significantly higher than that of the CK. It indicated that the floating nursing seedling technique had an obvious effect to seedling growth.