Sugarcane seedling culture method capable of advancing sowing time

Abstract

The invention discloses a sugarcane seedling culture method capable of advancing sowing time. The method comprises the following steps: (1) substrate sterilization; (2) sowing; (3) two-film warming for germination accelerating, and warming and moisturizing at night; (4) management after the three-leaf stage: light filling regulation, ventilation of a seedling culture greenhouse, fertilizer and water management, pest control and removal of sick seedlings and quite weak seedlings; (5) transplanting in a field. With the adoption of the method, the technical problems of late sowing and the like in the prior art are solved, the sowing date can be 30-45 days earlier, the seedling survival rate is high, sugarcane seedlings are robust, the culture cost is lower, and the sugarcane crossbreeding efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of crop seedling raising, and in particular relates to a sugarcane seedling raising method. Background technique [0002] Sugarcane is an annual or perennial tropical and subtropical herbaceous plant. It is a C4 crop and a plant with high light efficiency, high light saturation point, low carbon dioxide compensation point, low photorespiration rate, and high photosynthetic intensity. Sugarcane breeding requires sexual crossing, while reproduction is asexual. Every sugarcane within a variety has the same genotype, unless a mutation occurs by chance. Most of the varieties bred in various countries in the world are the hybrid offspring of 3-5 original sugarcane species, and then interbreeding and backcrossing are carried out, which is basically a recombination of varieties composed of homogeneous genetic types, which leads to inbreeding of sugarcane varieties. The narrowness and close blood relationship have ...

AI Technical Summary

Problems solved by technology

At present, during the sowing period of sugarcane seeds (mid-March to mid-April), it is the low temperature and rainy season, and the average temperature at night is only 13-16°C. When the sugarcane seeds are lower than 18°C, germination is slow and the seeds rot often. , low germination rate

It is often necessary to postpone the sowing time of sugarcane hybrid seeds (mid-April-mid-May), resulting in the ability to transplant into the field from mid-July to early August. Due to the insufficient growth period of the field, it is often postponed to March-April of the following year It can only be selected, or even cut off directly, and the perennial roots can be observed. The perennial root selection can only be done in November-December of the next year, which delays the breeding time for one year, which is not good for sugarcane hybrid breeding.

From May to late June, there is relatively abundant rain during this period, which is the best time for transplanting sugarcane seedlings in the field, while from July to August there is relatively little rain, and drippers or micro-sprays must be laid for transplanting into the field, so that The investment in seedling management is large, which increases the management cost of sugarcane hybrid seedlings in the field at the initial stage of transplanting, affects the efficiency of sugarcane hybrid breeding, and greatly reduces the probability of new varieties of sugarcane breeding

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