Detailed Explanation of Potato Cultivation and Weeding Techniques

For potato cultivation, choose loam soil with a deep tillage layer, loose texture, good drainage and rich organic matter whenever possible. Avoid plots with heavy clay soil, low-lying waterlogged areas or poor fertility. Corn stubble is the best choice, followed by soybean stubble. The plot must be one where herbicides with long residual periods such as chlorimuron-ethyl, imazethapyr and atrazine have not been used for 2 years. Whichever stubble type is chosen, after the autumn crop harvest, crush or dig out the previous stubble and remove it from the field.

????I. Weeding

First, closed weeding. After sowing and before emergence, use metolachlor emulsifiable concentrate and metribuzin, mix the solution according to the instructions, and spray it evenly on the ridge surface, which can effectively control annual grass weeds and some annual broadleaf weeds.

Second, post-emergence weeding. For post-emergence weeding, herbicides such as sethoxydim, haloxyfop-R-methyl, quizalofop-p-ethyl or Huangpai Chengshu can be used to control grass weeds, and different agents must be used strictly according to the instructions.

????II. Cultivation

Combine chemical weeding with manual control of broadleaf weeds and cultivation work such as loosening the soil. Carry out the first cultivation when more than 90% of the potatoes have emerged, with deep hoeing, focusing on weeding and raising the temperature; carry out the second during the plant branching stage, with careful and fine hoeing, focusing on weeding; carry out the third at the early flowering stage of the potatoes, with shallow hoeing, following the principle of not damaging the stolons, and after each hoeing, ridge the soil promptly. Apply urea 150-225 kg/ha and potassium sulfate 75 kg/ha as topdressing twice. Spray potassium dihydrogen phosphate once at the early flowering stage of the potatoes; at the early stage of tuber enlargement (full flowering stage), spray tuber enlargement agent once according to the instructions.