Abstract This paper studied the effect of bumblebee numbers and distance between hives on watermelon
seed production in net room by treatment Ⅰ:2 250 bumblebees · hm-2 and treatment Ⅱ:3 000 bumblebees ·
hm-2.Results showed that all indicators of watermelon seed treated by treatment Ⅱ were superior to those
treated by treatment Ⅰ,when the distances between hives were the same.Among treatment Ⅱ,the seed number
of single watermelon at the site 6 m away from the hives was the largest,significantly higher than that of the
contrast.Besides,the seed weight of single watermelon in this area was also the hightest,followed by the site
9 m away from the hives under treatment Ⅱ.There was no significant differences between the above 2 sites.
The highest weight of single watermelon and the 1 000 seed were found at the site 12 m away from the hives
under treatment Ⅱ,followed by the site 9 m away from the hives under treatment Ⅱ,there was no significant
differences with that of the contrast.In conclusion,seed quality is the best at site 9 m away from the hives and
with 3 000 bumblebees · hm-2 in net room.
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Received: 09 January 2020
Published: 28 June 2020
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