A seedling raising device suitable for machine-transplanted older seedlings and its application

Abstract

The invention provides an older-seedling cultivation device suitable for mechanical rice transplanting and application thereof and belongs to the technical field of agricultural cultivation. The older-seedling cultivation device comprises a seedling cultivation tray, a cultivation medium and seedling cultivation paper, wherein first seedling cultivation paper, the cultivation medium layer, first nutritional seedling cultivation paper and second seedling cultivation paper are sequentially arranged in the seedling cultivation tray. The older-seedling cultivation device has the advantages that according to the fact that when seedlings are 20 days old, the height of the seedlings is smaller than that of the control, the base stem width, leaf area, chlorophyll content and overground part and root system dry weight of the seedlings are evidently increased, and root shoot ratio and root system winding force and vigor are increased evidently, the device can evidently improve seedling quality;in addition, according to the fact that when the seedlings are 30 days old, the quality of the seedlings is evidently higher than that of the control, the height of the seedlings is evidently smallerthan that of the control, and the seedlings are still suitable for mechanical rice transplanting, the device can prolong the suitable planting period of the seedlings; meanwhile, the device can reducecultivation medium use amount, save cost for farmers and increase efficiency.

Description

technical field

[0001] The invention belongs to the technical field of agricultural cultivation, and in particular relates to a seedling raising device for older seedlings suitable for machine-transplanting and its application. Background technique

[0002] Under the premise of the current mechanized rice transplanting, it is also necessary to cultivate rice seedlings suitable for machine transplanting, but machine transplanting has strict requirements on the age of rice seedlings. If the seedling age of machine-transplanted rice is too long, the seedling height will increase, the yellow leaves will increase, and the rooting force will decrease. Late, the number of effective tillering nodes is less, which in turn affects the formation of the appropriate number of panicles required for high yield and reduces rice yield. Tests have shown that the suitable transplanting age for matrix seedling raising is in the range of 15 to 20 days. With proper cultivation, the yield per mu ...

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