1育苗困难问题及其解决办法发芽率低的原因及其解决办法无籽西瓜种子发芽率低的原因主要有4点:①种皮厚,种胚弱。其种皮厚度约为普通西瓜的1.5倍;种脐部分更厚,约为普通西瓜的2倍,不易吸水变软,妨碍种芽萌发,且种胚不充实;多畸形(子叶折叠或缺损),发芽无力。②种胚不充实,种内空腔比普通西瓜种子大,在浸种催 1 nursery problems and their solutions to low germination rate reasons and solutions There are four main reasons for the low germination rate of seedless watermelon seeds: ① seed coat thick, seed embryo weak. The thickness of its seed coat is about 1.5 times that of common watermelon. The umbilicus is thicker, which is about 2 times of that of common watermelon. It is not easy to absorb water and soften, which hinders the germination of seed germs and the seed embryo is not enriched. Many deformities (cotyledons fold or defect) , Sprouting weakness. ② embryo is not full, intraspecific cavity than ordinary watermelon seeds, seed soaking reminder