There are many advantages of planting autumn potato in rice field.

"there are many Rain Water in autumn, and the humidity in the field is high, so it is the most prone to rot, which has the greatest impact on seedling emergence and yield." A few days ago, Fang Di Duan, director of the agricultural technical station of Lu County Agricultural Bureau and senior agronomist, led the technical personnel of the county agricultural bureau to the second group of Yanyan Village, Zhaoya Town, Lu County, to guide farmers to plant autumn yams.

"Autumn potato is the focus of late autumn production and an effective way to make up for spring grain production. After making full use of the harvest time of hybrid rice, planting autumn potato in the stubble with a certain gap between spring and spring is an effective measure to achieve the goal of grain production for the whole year under the new situation that the summer drought and summer drought have seriously reduced grain production in the spring. " Fang Duan said.

It has been proved by planting for many years in Lu County that planting autumn potato in the fields harvesting hybrid rice has the advantages of simple planting, improving soil fertility, regulating temperature and preserving soil moisture, restraining weeds, saving labor and labor, increasing production and income, and so on. Through many experiments and demonstrations by the agricultural department for many years, the yield per mu is 1000 kg, and the output value is more than 4000 yuan.

Technical key points

The growth period of improved varieties of autumn potato is short, generally only 80 Mir 90 days, and the varieties with relatively short ripening period, short dormancy period and high yield, such as "Eshu 5", "Hui-2", "Feurita", "Sichuan taro early", "Sichuan taro 56" and so on, should be selected.

Sowing cool potato crops at the right time, it is better to keep the daily average temperature below 30 ℃.

Due to the long-term high temperature and summer drought this year, the vast majority of paddy fields are short of water and dry, so it is necessary to deep trench, drainage and waterproofing before sowing to reduce wet damage.

Sowing with buds

Sowing with buds is a key technical measure to promote the emergence of autumn potato seedlings early and neatly, and to strive for more tubers and big potatoes. Potato generally has a dormant period of 2-3 months, and seed potato treatment should be done according to different conditions.

Seeds were soaked in "1992 ○". Before sowing, take a bud hole as a potato block, first cut the potato seeds, and then soak the seeds in 1 gram of "92 ○" mixed with 2000 jin of water for 10 minutes, cutting while soaking, in order to break dormancy and shorten the emergence period.

Soak it indoors, cover it with wet straw, put seed potatoes in the middle and sow it before sowing, or cover it with moist straw for 15 days before sowing.

If the seed potato needs to be sliced and sown, the seed should be soaked in carbendazim with 1 Rue 800 times liquid for 60 seconds, and the seed potato must be dried before sowing.

Ridge planting

Select the land with high terrain and good drainage for ridge planting, and the rice fields should be high and deep ditches, drainage and waterlogging prevention, so as to prevent rotten seeds and dead seedlings.

Sow seeds in case of drought, shower nests with clear dung water, sow sooner or later to prevent sprouting. Because the growth period of autumn potato is short, the planting density should be higher than that of spring potato. Generally, the net planting of autumn potato is 0.85 meters in double rows, with a distance of 0.25 meters, planting 7000 nests per mu, and planting whole potatoes of about 20 grams-30 grams per litter, so as to cultivate whole seedlings and strong seedlings.

Early management

Heavy application of base fertilizer, early application of seedling fertilizer, and increase of phosphorus and potassium fertilizer.

During sowing, 1000 kg-1500 kg of farm manure, 100kg of plant ash and 20kg-30kg of phosphate fertilizer were applied as base fertilizer. When about 70% of seedlings emerge, use human and animal manure or nitrogen fertilizer per mu, topdressing and raising seedlings. After the seedling height is 15 cm, it begins to cultivate the soil in order to facilitate drainage and cooling.

Where possible, 0.1% potassium dihydrogen phosphate was sprayed with 1Mel twice to promote tuber expansion. In the early stage of growth, attention should be paid to drought resistance and seedling protection, and timely ploughing and loosening of the soil should be done after heavy rain to prevent soil consolidation and promote deep roots and luxuriant leaves. In the later stage, it is necessary to prevent and control late blight in time to ensure multiple harvests.

No-tillage straw mulching

For the former rice field, where the rice stubble autumn potato is cultivated with no-tillage and straw mulch, the field with low rice pile and no regenerated rice should be selected, and the trench should be made in the rice field according to the drainage direction.

The wet field under the trench is made of a ditch with a width of 6.8 feet, with a width of 6 feet and a depth of 1.2 feet. In general, rice stubble fields are trenched according to 12.8 feet per ditch, in which the width of the box is 12 feet, the width of the trench is 0.8 feet, and the depth of the trench is 1.2 feet. The width of the trench is 0.8 feet, and the depth of the ditch is 1Mel 1.2 feet.

The soil from the trench is crushed and evenly covered with the box surface, so that the height of the box surface of the whole field is the same, and the box surface cannot be watered.

For autumn potato in rice stubble, each mu of potato should be covered with straw of 1.5 Mu of rice field, and the thickness of straw cover is about 0.3 feet.