Salt Tolerance Capacity Of Halophytes And Their Effects On Coastal Saline Soil Improvement

Yellow River Delta is one of the Chinese famous delta, the potential of economy development is hugeness .because of there is much soil which is formed by dropping back of sea, the water table, the rate of mineralization of groundwater and the ratio of evaporation and rainfall (evaporation: rainfall=3.3:1)are high, the saline soil is formed typically. The content of salt is more than 1%, the amount of plant is a few and zoology is weak, which restrict the production of agriculture and afforesting seriously. Now cities afforest using soil moved into improve the original, the cost and the cost of maintenance are both high, the proportion of forestation is affected, and woodland is hard up. This text is based on the reality of Yellow River Delta, in the view of the present study, we chosen 12 kinds of representative halophyte, and used salt pond as the imitation of experiment of salt water irrigating field and field of small-scale production to make sure their capability of salt-resistant and make up different pattern. In order to providing basis for afforesting of bank saline soil and constituable development and utilization, we tested planting on heavy, moderate, light salinized alkaline soil and studied the growth amount, survival rate, the cost of forestation and the effect to structure and fertility of soil. The mine content and reason of test are as follow:1. The Test Make Sure the Capability of Salt-resistant of the 12 Kinds of Representative Halophyte on the Saline-alkaline Soil of Yellow River Delta The test make sure the capability of salt-resistant of the 12 kinds of representative halophyte choosing by this test on the bank saline soil of Yellow River Delta by irrigating field using salt water as imitation of field test and observing field test. The capability of salt-resistant of Nitrariasbiricapall, Tamarix chinensis, Elaeagnus angus tifolia L., Pucinellia temuiflora, Yucca gloriosa, Vitex trifolia Linn.var.simplieifolia Cham, Pyrus betulaefolia Bunge, Limonium macrophyllum (Brouss.) O Kuntze, I.ensata Thunb. Var. chinensis Maxium, Frxinus veluting, Thermopsis chinensis Benth. ex S. Moore, Ziziphus jujube Mill cv.'lizao'are 1.5%, 1.5%, 1.0%,1.0%, 1.0%, 1.0%, 0.8%, 0.8%, 0.8%, 0.6%, 0.6%, 0.5% respectively.2. Make Clear the Combination Pattern of the Halophyte on Heavy,...