| Bohai Rim is one of the regions who is seriously short of water resources and have Severe desertification. to improve the shortage of freshwater resources in the Bohai Sea agricultural status has great significance. At present, sea ice has been used to address the scarcity of water resources research focus. Bohai sea water can be freezing in the winter phenomenon, the sea ice, is one of the water freezing, and salt will be squeezed out of them, so water salinity significantly reduced after freezing. Simply prepared sea ice, can be converted into fresh water for agricultural use, and low cost reserves of the Bohai sea ice can provide at least 32% of farmland in the area of water supply, irrigation and water plants during the spring natural frozen and Bohai Bay sea ice melt water generated during the match. Using Bohai Sea ice water for irrigation, can solve the Bohai Rim shortage of fresh water resources issues such as the Bohai Sea region’s sustainable social and economic development of a new way. Rational use of ice water for agricultural irrigation, with different agronomic measures, improvement and development of the Bohai Sea region who has a large number of saline land and wasteland, the development of far-reaching economic impact of agriculture in the region. In this study, Hebei Huanghua Bohai Sea in saline areas for the test base McNair Friendship Farm, through the use of salt as 3g/l and salinity of sea ice as 1g/l of well water compared saline irrigation of cotton experiment in facilities for irrigation water increases soil water conservation agent polyacrylamide (PAM) and PAM does not add two treatments, and fertilization with 4 modes (no fertilizer, inorganic fertilizer, manure fertilizer and inorganic fertilizer, inorganic fertilizer combined application of gypsum) a total of 16 treatment of the sea ice, PAM, and different fertilization saline cotton yield, quality and growth conditions influence on soil nutrients, salinity, sea ice to prove the feasibility of alternative irrigation water, PAM’s role and its appropriate mode of fertilization. Study the following conclusions:(1) 2009,in Huanghua test area, the sea ice water irrigation (no fertilizer) in all cell growth at all levels in all the soil moisture content of the irrigation district with well water were not significantly different (P<0.05), cotton sowing, flowering and boll opening irrigation district lm of sea ice soil total salt content of soil irrigated with well water was no significant difference in area (P<0.05), shows that sea ice can be used as a new irrigation water to replace the well water saline irrigated cotton fields.(2) PAM applied in irrigation wells in the coastal saline land farming can be effective in preventing soil alkalinity, gypsum may make this more obvious. Irrigated with well water in the coastal sea-ice alternative saline, alkaline soil caused by the possibility of relatively large number, but sea ice in the water with gypsum applied PAM and fertilizer, can be effective in preventing soil alkalization.(3) 2007～2009 PAM applied in irrigation water after the sea ice, can effectively improve the cultivated soil available nitrogen and phosphorus content, cotton production was significantly higher than that of well water for irrigation (P<0.05), which added that sea ice in the water Comparison of irrigation and well water irrigation PAM, to improve the soil nutrient status, increased cotton production.(4) 2009,9 days after the first irrigation, the sea ice PAM applied irrigation water, manure fertilizer and inorganic fertilizer, inorganic fertilizer combined application of gypsum at 0-40cm soil moisture levels were significantly higher than those in the soil when the application of inorganic fertilizer moisture content (P<0.05), indicating combined application of inorganic fertilizer manure, inorganic fertilizer combined application of gypsum in the topsoil can play the role of good water. |
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