The application discloses a cotton field water and
fertilizer integrated
irrigation and fertilization method and relates to the technical field of
agricultural irrigation and fertilization. The method takes 5 years as a
production cycle, removes field sundries in the cotton field and deeply ploughs the whole field to improve the soil 5-6 months before
sowing in the first year, and does not deeply
plough the whole field in the second to fifth years; a parallel
ditch is opened along the cotton
sowing line to lay an inner-inlaid
patch type drip irrigation belt before
sowing in the first year, the parallel
ditch is not covered with soil, and narrow and shallow rotary
tillage is only performed on the cotton sowing line every year, and
phosphorus and
potassium fertilizers need to be applied before the narrow and shallow rotary
tillage;
drip irrigation is controlled according to the
soil water content of a 15cm soil layer of the cotton field after cotton sowing,
nitrogen fertilizer is drip-applied with water at the present
budding period, the initial flowering period and the full flowering period, the
production cycle is reset in the cotton field after the fifth year. The method realizes multi-year reuse of the
drip irrigation belt, saves soil
moisture by narrow
tillage, accurately supplies water and
fertilizer, improves the water and fertilizer
utilization rate of the cotton field, reduces the field operation cost, and is suitable for large-scale and efficient planting of the cotton field in the cotton area of the Yellow River Basin.