Why can bee pollination increase crop yield?

0 1 bees have a lot of hair. When it collects nectar and pollen, it always flies from one flower to another and back and forth, accompanied by it, bringing the pollen stuck to the stigma, so that the pistil can get more pollination opportunities. After full pollination, crops not only produce full seeds, but also have a large number and good quality.

Plants in nature, such as plants, almost all bloom first and then bear fruit. Whether it is self-pollination or cross-pollination, it is necessary to bring pollen originally growing on stamens to the stigma of pistil with the help of wind or insects to form pollen tubes, which extend into the stigma and then into the ovary, so that sperm nuclei and egg nuclei can combine to form fruits or seeds. If it is not pollinated, it will not bear fruit even if it blooms.

If you have peeled a sunflower, you have an experience: the seeds on the edge of the sunflower always grow full, and once they reach the center of the vegetable, the particles are smaller or even empty. This is because there is not enough pollen or there is no pollen at all.

Bees have a lot of hair. When collecting nectar and pollen, they always fly from one flower to another, back and forth, and then bring the pollen stuck to their bodies to the stigma, so that pistils can get more pollination opportunities. After full pollination, crops not only produce full seeds, but also have a large number and good quality.

There is a large pear forest around Huaguo Mountain in water curtain cave, Bin County, Shaanxi Province. For more than 20 years, it has only blossomed without fruit. The agricultural technical guidance station of this county conducted an investigation and observation on this pear tree, and found that these pear trees had no fruit because they had no chance to be pollinated. So when pear trees bloom, they put bees to help pollinate. After doing this, pear trees bear many fruits every year. Anmin Brigade of Xingshan People's Commune in Zhaozhou County, Heilongjiang Province used 285 bees to pollinate 6 185 mu of sunflower in 1960, and the average yield of sunflower seeds per mu was 80 kg, which was 15 1% higher than that of no bees 1959. Each bee also collected 98 kg of honey.

In China's rapeseed producing areas, the yield-increasing experiment of pollination by bees proved that under the same soil quality, varieties and cultivation techniques, the yield per unit area increased by 37.5%, the oil yield increased by 65,438+00% and the seed germination rate was 95%.