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Method for preventing winter fruit drop of late-maturing citrus

A fruit drop and citrus technology, applied in fertilization methods, cultivation, fertilization devices, etc., can solve problems such as fruit drop, affecting fruit yield, old leaves yellowing, etc., and achieve the effect of increasing yield

Inactive Publication Date: 2013-11-20
CHONGQING AGRI TECH EXTENSION STATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, during the growth and maturity of citrus, yellowing of old leaves and fruit drop often occur.
Especially for late-maturing citrus, due to the severe winter, the severe overwintering fruit will fall off due to the cold damage, which will affect the fruit yield.

Method used

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  • Method for preventing winter fruit drop of late-maturing citrus
  • Method for preventing winter fruit drop of late-maturing citrus
  • Method for preventing winter fruit drop of late-maturing citrus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The main variety in Huangtu Orchard in Zhongxian County, Chongqing is Olinda Xia Orange. Continuous leaf and fruit fall occurred in a large area, resulting in basically no harvest (see Picture 1-1 ).

[0025] Field observation: tree observation: the shedding rate of old leaves and overwintering fruits is more than 80%, and they are basically finished. The current leaves are mainly new spring shoots and new leaves. Dark brown spots appeared on the back of the leaves and the peel of the fruit, and no red yellow spider was found to cause damage. Observe the site conditions of the orchard: near the fertilization area of ​​tree trays, green algae overgrowth is common, which proves that the amount of phosphorus fertilizer application is relatively large, and there are traces of lime application. Most of the fruits fell off, and large-scale leaf and fruit shedding occurred in late-maturing summer orange orchards, resulting in basically no harvest, and the damage was more se...

Embodiment 2

[0040] Changshouduzhou late-maturing mandarin orange orchard has yellowing phenomenon since 2007, and it has not been cured for a long time; 1.0-2.0Kg / plant quicklime calcium supplementation has been used successively, resulting in severe flower and fruit drop, resulting in basically no production in the orchard, and the yellowing of the top of the spring and summer shoots is aggravated. 1 / 3~1 / 2 of the new shoot tip scorched.

[0041] Field observation during the yellowing period in August 2009: Duzhou Orchard planted 56 Murkots per mu, the orchard was planted in a standardized manner, and the drainage was good. Yellowing of the top of the new shoots and severe dieback of the tops of new leaves appeared in the tree body. The incidence of yellowing It was 22.3%, and there was no defoliation phenomenon, and the damage caused by infective diseases was basically ruled out. (See figure 2 ).

[0042]Fertilization survey: Duzhou Orchard was tested and put into production in 2008,...

Embodiment 3

[0045] Baohe Orchard in Changshou District: 84 mu planted late-maturing citrus W Mocott or late-maturing navel orange Powell. On December 20, 2010 and January 2, 2011, there were two consecutive low-temperature rainfall weather phenomena, and -3°C frost occurred at night , leading to frostbite and falling off of some fruits. When the second low-temperature rainfall occurred, although the smoke protection was carried out in time to reduce the frostbite, the fruit drop rate was more serious, exceeding 70%, and the output dropped from the original 1.8 tons to less than 0.5 tons ( See Figure 3-1 and Figure 3-2 ), close to nothing.

[0046] Soil testing: Lime was applied in Baohe Orchard in 2009, and the leaf calcium content reached 4.86%, and the leaf potassium content was only 0.53%, which was extremely deficient.

[0047] Cool Fruit Garden in Wushan County: In spring 2008, W Murcott and late-maturing navel orange Powell were planted. Through cultivation measures, the potassi...

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Abstract

The invention provides a method for preventing winter fruit drop of late-maturing citrus. The method is characterized in that a citrus leave comprises 0.7-2.0% of potassium and 1.6-7.0% of calcium. The phenomenon of the fruit drop of a citrus tree in winter is prevented effectively. Under the condition of chilling damage of frost, low-temperature, snow and rain weather and the like, the fruit drop rate of the citrus is reduced by 5%. When the temperature is equal to or larger than at -3 DEG C, the citrus cannot drop severely even if a tree crown, tree branches, leaves and pericarp are frostbitten. Yield of the late-maturing citrus is improved effectively, and the yield exceeds 2 tons per mu.

Description

technical field [0001] The invention relates to a method for preventing and controlling fruit drop of citrus trees. Background technique [0002] Citrus is an important economic crop in our country. Its fruit is rich in nutrition, delicious in color, fragrance and taste. It can be eaten fresh or processed into various products mainly including fruit juice. Can be used as medicine. Its output ranks first in the world. [0003] However, during the growth and maturity of citrus, yellowing of old leaves and fruit drop often occur. Especially for late-maturing citrus, due to going through severe winter and suffering from cold damage, serious overwintering fruit will fall off, which will affect fruit yield. Contents of the invention [0004] The object of the present invention is to provide a method for preventing and controlling late-maturing citrus fruit drop in winter. [0005] The object of the present invention is achieved by the following measures: [0006] A method f...

Claims

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Application Information

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IPC IPC(8): A01G17/00A01C21/00
Inventor 熊伟夏仁斌冯洋吴正亮孔文斌
Owner CHONGQING AGRI TECH EXTENSION STATION
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