On April 20, Wang Yuanjun, a reader of Yingshui Township in Jiange County, scored a hotline on the newspaper, saying that he read the article on the April 14th edition of the newspaper “Production of rice straw covered with no-tillage yam doubled†and was very interested in the detailed technology. To this end, the reporter once again interviewed Tang Zhengwen, a technician at the Soil Fertility Station of the Agricultural Bureau of Hejiang County, to learn more about the technical points of rice straw cover cultivation in rice fields.
Reporter: What are the preparatory tasks for rice fields covered with straw in rice fields in the early stage of cultivation?
Tang Zhengwen: After harvesting rice, he chose to plant autumn rape or spring potatoes in plots planted with rapeseed.
Variety selection: The first is to use a whole potato as a seed potato to prevent rotten seedlings; the second is to use precocious species in order to get the expected yield. If late-maturing species are used, the temperature will decrease when the potato is grown. The potato has been The elimination of seedlings began to affect the yield; the third was to cover an acre with two acres of straw and the potatoes were large and fresh, avoiding the appearance of green and red skin.
Reporter: What technical points should be noticed?
Tang Zhengwen: Although the autumn potatoes can be planted from the beginning of autumn to the white dew, the sooner the seeds are sown in this area, the higher the yield should be sowed early. The best sowing date is from August 25 to September 5. Spring potato sowing is generally from late November to early December. Sowing should be appropriately increased density, ridge cultivation and sowing. Reason ditch ditch, net for 0.85 to 0.9 meters open, double rows, spacing 0.25 meters, acres planted about 6,000; intercropping based on the size of blank line spacing, can broadcast 1 to 3 lines, spacing 0.25 meters. By seed size, one or two buds are seeded per litter. If there is no fresh straw, dry straw can be fully soaked and then drained to remove excess moisture and cover the grass. Straw should not be covered with soil.
Reporter: How to fertilize it?
Tang Zhengwen: After planting potatoes, 500-600 kg of straw is used to cover the surface of the car, and the thickness of the cover is not good enough. After cover grass, apply aerobic straw decomposition agent evenly. Fertilization is generally based on decomposed organic fertilizer, with 2000 to 2500 kilograms of residue fertilisers, 30 kilograms of sulphur and potassium compound fertilizers (halogenous chlorine-containing fertilizers), and evenly mixed into the nest. After the seedlings are fully planted, weeding should be carried out in time, combined with the lifting of the earth.
Reporter: There are not many pests and diseases in the process of planting? How to prevent and treat pests and diseases? When do you harvest it?
Tang Zhengwen: The potato late blight has a great impact on the yield and must be observed and controlled in time. It can be controlled 1-2 times by using endophytic fungicides such as Rhizoctonia. Appropriate delayed harvesting of autumn potatoes has a certain role in increasing production, but harvesting must be completed before falling frost, otherwise it will suffer freezing injury. Spring potatoes are harvested from the end of March to the beginning of April.
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