Cultivating method for japonica rice variety strong in lodging resistance and suitable for mechanical transplanting of rice

Abstract

The invention discloses a cultivating method for a japonica rice variety strong in lodging resistance and suitable for mechanical transplanting of rice. The cultivating method comprises a first step of choosing strong-root strong-stalk large-ear high-quality intermediate materials and a main-push variety with wide adaptability to undergo hybrid matching; a second step of choosing seeds with strong bud potential in an F2 generation to cultivate the seeds to a two-leaf one-tip stage, choosing a plurality of strong seedling bodies after treatment to perform transplantation, selecting single plants with good comprehensive agronomic characters at a heading stage to perform flag leaf separation aging experiments to perform primary selection, and performing a re-selection at a mature stage; a third step of performing dense sowing in an F3 generation to an F5 generation according to the requirements of mechanical transplanting of the rice and seedling raising, surveying seedling quality at a seedling age of about 30d, choosing strong seedling strains to perform transplantation, performing a high ear fertilizer test, and choosing lodging-resistant and high-quality strains which change color smoothly; and a fourth step of performing strain comparison tests of mechanical transplanting of the rice, and selecting high-quality high-yield lodging-resistant strains. The cultivated variety can be above high-quality rice of level 3 of the national standard, and high and stable yield and efficient production are achieved.

Description

technical field [0001] The invention relates to a plant breeding method, in particular to a method for cultivating japonica rice varieties suitable for machine transplanting and strong lodging resistance. Background technique [0002] Rice is the largest crop in my country. There are two main subspecies of rice cultivated in China, namely the indica subspecies and the japonica subspecies. my country's food security is under great pressure, and high yield has always been the eternal theme of rice breeding. Under a certain harvest index, increasing the yield per unit area must increase the biological yield, and increasing the biological yield will inevitably increase the height of the plant and also increase the risk of lodging. With the transfer of the rural labor force, the proportion of light cultivation methods continues to increase, especially machine-transplanted rice seedlings; machine-transplanted rice seedlings are prone to two problems in production: ① The quality o...

AI Technical Summary

Problems solved by technology

With the transfer of the rural labor force, the proportion of light cultivation methods continues to increase, especially machine-transplanted rice seedlings; machine-transplanted rice seedlings are prone to two problems in production: ① The quality of machine-transplanted rice seedlings is relatively weak, and mechanical planting is severely damaged during the machine-transplanted process. The period of rejuvenation is long; ②The group of machine-transplanted rice seedlings tends to be too large, which increases the risk of lodging

Selecting strains with strong stalks and large spikes can effectively improve plant damage resistance and lodging resistance, but problems such as uncoordinated spike-grain structure and low-quality large spike filling also come one after another.