Effect Of Different Improvement Measures Of Desalination And Salt Suppression On Saline-alkali Soil

Owing to the high underground water level in Yellow River irrigation area, Yellow River water to reduce caused by such factors as secondary saline-alkali land waste,easy FanYan, low survival rate of crops in the desalination and salt "suppression for salt water control technology, research and development of a quick rinse under rainfed conditions improved, farming, vertical drainage salinity or salt water and salt control key technologies,such as establishing complete technical alkali-saline land system, provide scientific basis for using the alkali-saline land. The main results are as follows:1. Testing the effect of salt wash dry conditions. By using split plot experiment design layout of field experiment , the study found no brine channel 0-20 cm soil treatment 4(desulfurization gypsum + deep loosening tillage) total salt content in soil dropped 39.3%,treatment 2 (use of desulfurization gypsum) soil total salt by 26.20%, treatment 3 (deep loosening tillage) soil total salt content decreased by 13.22%, 20-40 cm soil treatment 4(desulfurization gypsum + deep loosening tillage) total salt content in soil dropped 23.79%,treatment 2 (use of desulfurization gypsum) total salt content in soil dropped by 18.80%.Groove set the row of salt can reduce the soil salt, with 4 (set drainage salinity ditch +desulfurization gypsum + deep loosening tillage) arable layer soil total salt content dropped by 34.73%, the top layer of soil salt is down by 66.51%. Soil alkalization degrees dropped 34.35% than control.2. The effect on drainage salinity soil test. In order to accelerate dry salt wash effect,achieve the purpose of quick exhaust salt, research set different salt hole for desalting effect, determined to break the clay layer, dredge brine channel optimal vertical hole arrangement. Two factors experiment design, one for the row of salt hole number, three levels: don't punch (1), 200 hm'2 (2), 400, hm-2 (3); Number of factors were water leaching,two levels: 1,4 times. Four irrigation treatment in water one basis. Plot area is 4 m x 50 m=200 m2, every deal with 3 replications. Brine hole number is 300, hm'2 biggest drop in dealing with soil total salt content, 38.71% drop in total salt content and set the row of salt hole number, the more the corresponding soil desalting rate is higher.3. Different agronomic measures to prevent salt salt suppression effect research. To control soil FanYan, the row, covering, steamed up deals with different agronomic measures such as planting salt salt suppression effect, put forward the feasible prevention saline-alkali salt salt suppression technology. Latin square design was used with a reference (1), row (2), the ditch plant (3), steamed covers four (4), 4 times repeated.Cultivating,prevent the measures such as covering,steamed up deals with plant can improve the germination rate, we yield in different degrees, the germination rate increased by 6.98%, 42.87% and 42.87% respectively than control, production increased by 23.30%,46.62% and 58.90% respectively than control.In conclusion, applying punching gypsum, sand filling and intertillage, covering,steamed up deals with prevention measures such as graft can significantly improve the saline-alkali land, improved through a quick rinse, farming, vertical drainage salinity or salt water salt regulation the key technology such as provide the basis for later alkali-saline land.