The invention discloses a southwest hilly area
dry land purple potato cultivation method, and relates to the technical field of
crop cultivation. The southwest hilly area
dry land purple potato cultivation method specially includes: deeply plowing land before
sowing, and applying compound
fertilizer on a base of the land;
sowing purple potato seeds with
bud eyes after disinfecting the purple potato seeds with the
bud eyes; laying a
drip irrigation belt among rows of a
ridge side, covering the
drip irrigation belt with a black mulching film, and confirming
irrigation frequency according to conditions of a
water source; under the condition of needing
irrigation once, irrigating the land in a squaring period; under the condition of needing the
irrigation twice, respectively irrigating the land in a
seedling emergence period and the squaring period; under the condition of needing the irrigation thrice, respectively irrigating the land in the
seedling emergence period, the squaring period and a blooming period; under the condition of needing the irrigation for four times, respectively irrigating the land in the
seedling emergence period, the squaring period, the blooming period and a mature period; keeping the irrigation amount once within a range from 15 cubic meters to 20 cubic meters, and keeping drop irrigation time once within a range from 6h to 8h; spraying 0.3%
monopotassium phosphate on leaf surfaces of the purple potatoes in a tuber expansion period of the purple potatoes. The southwest hilly area
dry land purple potato cultivation method adapts to ecological conditions and an existing planting technology of the Sichuan hilly area dry land, and observably improves a yield, quantity and income of the purple potatoes in the Sichuan hilly area dry land.