The invention discloses a
water saving and
fertilizer controlling ecologic governing and synergic utilizing method for a heavily salinized land. Ardealite is applied to the heavily salinized land; smash-ridging, subsoiling and uniform mixing are performed, and according to a soil salt control target, non-growth-period
irrigation salt forcing is performed; after base
fertilizer and
humic acid are mixed, furrow application is performed, a
drip irrigation zone is laid for membrane laminating and seed
sowing, a soil depressimeter is embedded under the membrane, a geotechnical cloth is laid on theground surface between membranes, in the
crop growth period,
brackish water is adopted for
drip irrigation water-
fertilizer integration combined application of
humic acid, according to the soil salt conditions and the
crop water-fertilizer requirement characteristics, the
drip irrigation moment is determined, and on the basis of the depressimeter, the
irrigation water amount and the
irrigation stopping time are determined. The problem that agricultural planting
water resources in an
arid region are lacked is solved, the requirement for salt control over
saline-
alkali soil farm irrigation is met, and the ecologic governing requirement for improving the
saline-
alkali soil water-fertilizer utilization efficiency and increasing production and income is met.