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1.影响制种产量的主要因素 1·1 母本密度小,有效种瓜数少。调查分析表明,增加种瓜数比增加单瓜重更有利于提高种子产量。这是因为1kg种瓜的采种量随单瓜重的增加而降低,随单瓜重的减少而提高。据1993年对兰州P_2采种量的调查,5～6kg种瓜平均单瓜采种量为470.8粒,2～3kg种瓜平均单瓜采种量为320.3粒,1kg大种瓜采种子78.5～94.1粒,1kg小种瓜采种子100.2～150.0粒。可见由于密植而使种瓜变小,但种子产量仍在增加。一般制种密度要
1. Major Factors Affecting Seed Production 1.1 The density of the mother plant is small, and the number of effective seeds is small. Survey and analysis shows that increasing the number of cucumbers increased more than a single melon is more conducive to improving seed yield. This is because 1kg kinds of melon seeds with a single melon weight increase with the decrease, with a single weight loss increase. According to the survey of P_2 in Lanzhou in 1993, the average single melon seeds of 5 ~ 6kg seeds were 470.8 seeds, the average single melons seeds seeds of 2 ~ 3kg seeds were 320.3 seeds, the seeds of 1kg seeds were 78.5 ~ 94.1 seeds, 1kg small seed melon seeds 100.2 ~ 150.0 tablets. It can be seen that because of the close planting, the seeds are smaller, but the seed yield is still increasing. General seed density to be