Method for measuring cold requirement of peach blossom buds under facility conditions

Abstract

The invention discloses a method for measuring cold requirement of peach blossom buds under facility conditions. The method comprises the following steps: selecting wild peach seeds harvested in the current year in August, removing endocarp, refrigerating the wild peach seeds and then sowing the seeds to obtain wild peach stocks with leaves; selecting branches growing normally and having blossom buds on the periphery and in the middle of a crown of a variety to be measured as scions from the end of November to the beginning of December, and grafting the scions to the wild peach stocks obtained by cultivation every 3-5 days; immediately cutting the stocks after grafting, reserving the stocks within 15 cm above a grafting opening, and cutting off the stocks exceeding 15 cm above the grafting opening; counting the flowering condition after grafting, and reserving peach seedlings with the normal flowering proportion exceeding 60% for subsequent counting; and performing artificial pollination on the reserved peach seedlings, then counting the fruit setting rate, and if the fruit setting rate exceeds a set value through first investigation, taking the field cooling capacity accumulation value of the flower buds of the grafting batch as the cold requirement of the measured variety.

Description

technical field [0001] The invention relates to a method for measuring the cooling capacity of peach flower buds based on grafting technology under facility conditions, belonging to the field of fruit tree planting. Background technique [0002] The effective low temperature hours required for deciduous fruit trees to release natural dormancy is called the cooling requirement of fruit trees, also known as the low temperature requirement or the accumulated temperature required for cooling. Cooling demand is the key basis for predicting climate change, determining the timing of temperature control in protected cultivation, and selecting suitable varieties according to local conditions. If the cooling capacity is insufficient, deciduous fruit trees cannot normally complete the whole process of natural dormancy, which will inevitably cause growth and development disorders and affect the yield and quality of fruits. Protected cultivation of peach can usually produce good economi...

AI Technical Summary

Problems solved by technology

The determination methods of peach cooling demand reported at home and abroad are basically the following three methods. The first one is the field observation and statistics method, which is mainly used in the establishment of the cooling demand estimation model. Due to the large standard deviation of the measurement results, in It is hardly used in the evaluation of actual cooling capacity

The second is the hydroponics method. In the process of cold accumulation, the branches are continuously collected, and the light, temperature and humidity are artificially controlled for in vitro cultivation; 10 days, or up to 3 weeks; then carry out hierarchical statistics based on flower bud weight or shape changes, combined with air temperature statistics during the process of cooling accumulation, use the cooling demand estimation model to estimate the cooling demand; this method is currently the most commonly used method , but the training conditions are harsh and the procedures are complicated and cumbersome

[0008] CN107027605A discloses a method for measuring the cooling capacity of cherries. The method for measuring the cooling capacity of cherries used in the method is actually a conventional method for culturing in vitro after collecting branches. Although the method is called semi-living culture The method of measuring the cooling capacity of cherries, but the material used in essence is the isolated branches inserted in the culture solution, which also has the defect of only counting the flowering situation and not being able to count whether the fruit can be set normally

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