Pomegranate falling flower causes and prevention

First, the reasons for falling fruit, abortion, severe pomegranate flower morphology can be divided into four types:
(1) The pistil is higher than the stamen;
(2) The pistil is equal to the stamen;
(3) The pistil is lower than the stamen, degenerate 1/2 to 1/3;
(4) Complete degeneration of pistil 2. Time of pollen loosening of anther and pistil pollen powder. Influenced by natural conditions such as temperature, light, etc., sufficient light is available, and appropriate temperature is favorable for flowering loose powder. The pomegranate flowers are open every day from 8:00 to 10:00, and begin to loosen at 8:00 on the second day of the flower opening before May 20th. A large amount of loose powder is around 16:00. With the increase of temperature, the light increases and it is open on the same day. The flowers were mostly scattered around 18:00, and they were loosely powdered the next day at 8:00. However, after June 20th, the temperature continued to rise and the light was further enhanced. The amount of anthers was reduced, and the pink flower was scattered. Dim, weak life.
The ability of the stigma pomegranate to receive pollen directly affects the fruit setting rate. In natural circumstances, the pomegranate is pollinated two days before and on the same day, the next day pollination, can get a higher fruit setting rate, and in the flower opening three days pollination, pistil The stigma has lost its ability to accept pollen.
3, pre-flowering pollination insects Less pomegranate, although self-fruiting ability, but the fruit setting rate is not high, and cross-pollination can significantly increase the fruit setting rate. Insects are the main pollinators and are closely related to the fruit setting rate, especially for early fruit setting. Before May 30, due to the low temperature and low pollinating insects, it was an important factor affecting the results of early flowering.
Second, the preservation of fruit protection measures 1, to improve the quality of flowers is the key to flowering time and flower bud differentiation of nutritional status. During the first two batches of flower differentiation, fertilization was increased, the top dressing was applied outside the flowering period, flower bud differentiation was promoted, the proportion of normal flowers was increased, and the quality of flower buds was improved.
2. To create pollination conditions When setting up a garden, when highlighting the main cultivars, more than 3 varieties should be allocated as pollination trees. The ratio is generally about 6:4.
Where there is a bee source, the bees are placed in the pomegranate garden before flowering, and pollination is assisted by the use of colonies. However, the flowering period requires less spraying and no pesticide spraying. When pollination is artificially assisted, pollen of both female flowers and abortive flowers can be used. Pick the abortive flower (pollen grain bright yellow) of the loose powder on the day, remove the buds and petals, expose the anthers, and directly grant the stigma of the complete flower. The complete flower is about to be opened immediately or just after the opening when the stigma is fresh. The ability to accept pollen is strong.
3, buds, fruit thinning from the flower buds can be identified when the complete flower and abortion flowers, to the end of the flowering period, the removal of 70% of the abortive buds; clustered inflorescence leaving only one top complete flower, and the rest removed; Double fruit, fruit, leaving only one fruit; to concentrate nutrients, increase fruit setting rate and fruit weight, improve yield and fruit quality.
4. Use a hand-held sprayer with a growth regulator to spray 5 to 10 ml/liter of gibberellin to the open full flower torus, 5 to 20 ml/l of 2,4-D sodium salt, and spray 2 to 3 at flowering. Times

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