Screening method for drought-resistance corn germplasm

Abstract

The invention discloses a screening method for a drought-resistance corn germplasm, and belongs to the technical field of corn seed culturing and screening. The screening method for the drought-resistance corn germplasm comprises the following steps of seed selection, seed dressing, fertilizer application and ditching, sowing, watering, broadcast application of calcium hypophosphite, observation for the corn heading rate, harvesting and inspection for the corn yield; the calcium hypophosphite is dissolved in water, the calcium hypophosphite and moisture in soil can be subjected to a hydrolysis reaction, the calcium hypophosphite can be hydrolyzed into hypophosphite ions and calcium ions, and the hypophosphite ions can react with residual carbonate apatite to generate free phosphonium ions and calcium carbonate; the free phosphonium ions in soil can be effectively absorbed by corn roots, therefore the growth of the corn roots can be improved, the calcium carbonate has water absorption performance and can absorb moisture in the soil for corn growth, and therefore the drought-resistance capacity and lodging-resistance capacity of corn are improved.

Description

technical field [0001] The invention relates to the technical field of maize breeding and screening, in particular to a screening method for maize drought-resistant germplasm. Background technique [0002] Corn is an annual herbaceous plant belonging to the Poaceae Zea genus. It has tall plants and strong stems. It is an important food crop and feed crop. It is rich in protein, fat, vitamins, trace elements, cellulose, etc. Great potential for functional foods. [0003] The area of ​​arid and semi-arid land in my country accounts for about 47% of the total area of ​​the country. Drought has always been one of the main disasters affecting crop production. The droughts that occur in different degrees every year have caused huge losses to my country's economy, especially agricultural production. In recent years, the area of ​​corn It has become the largest food crop in my country, and more than 50% of it is planted in the dry land that relies on natural precipitation and lacks ...

AI Technical Summary

Problems solved by technology

[0003] The area of ​​arid and semi-arid land in my country accounts for about 47% of the total area of ​​the country. Drought has always been one of the main disasters affecting crop production. The droughts that occur in different degrees every year have caused huge losses to my country's economy, especially agricultural production. In recent years, the area of ​​corn It has become the largest food crop in my country, and more than 50% of it is planted in the dry land that relies on natural precipitation and lacks water in the Northwest, Southwest, North China, and Northeast regions. In some places, the evaporation is large, and the water loss is fast. Moreover, the variability of precipitation is very large, and the rate of meeting the water needs of corn growth and development is low, which seriously affects the production of corn, resulting in low yield and inter-annual instability. Drought is the main reason for the fluctuation of corn yield in my country. The shortage of agricultural water resources and the Soil Poorness Has Been a Major Limiting Factor in Improving Maize Productivity

[0004] Studies have shown that maize drought-resistant breeding is an effective way to improve the drought resistance of varieties and reduce the losses caused by drought. The drought-resistant and non-drought-resistant maize is mainly reflected in the yield. The drought-resistant varieties can stably and high-yield under drought conditions, while the non-drought-resistant varieties can not. On the contrary, the drought resistance identification of maize germplasm is a key step in evaluating and breeding new drought-resistant maize germplasm. The identification methods and screening methods of drought resistance, therefore, need to strengthen research in this area

[0005] At the same time, during the planting process of corn in the prior art, when there is drought and strong winds, the corn will be dumped in a large area, and the seed setting rate of the lodging corn will decrease, which may cause a decrease in yield and an increase in cost. Further, a drought-resistant corn The screening method of lodging resistant germplasm is particularly important