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我场地处杭州湾南岸,是1970年底围垦起来的海涂,土地盐咸而贫瘠,有机质含量很低,初垦时,耕层中有机质含量只有0.3%。经过几年垦种,耕层中含盐量已降低到0.1%,土壤物理性质也有所改善,但由于垦种过程中,施用化肥为主,土壤中有机质含量增
My field is located on the south bank of Hangzhou Bay. It is a tidal flat reclaimed by the end of 1970. The land is salt-salty and barren with low organic matter content. Only 0.3% of organic matter in the tillage layer is planted at the time of initial planting. After several years of cultivation, the salt content in the topsoil has been reduced to 0.1%, and the physical properties of the soil have also been improved. However, due to the application of chemical fertilizers and the increase of organic matter content