论文部分内容阅读
珠江三角洲是华南最大的三角洲平原,全国著名的水稻生产基地,其土壤的形成发育是与.三角洲的形成发展密切相关,并随其演变而不断演化。即泥滩生草或长红树林后,围垦种稻初期,形成沼泽型或酸性盐渍型、盐渍型水稻土,随着种稻时间的延伸,脱沼泽化、脱酸化、脱盐化作用的不断进行,发育成潜育型和潴育型水稻土。在此发育过程,肥力自然趋于下降,但人为的耕作、施肥水平是影响其肥力和发育方向的关键因素。
The Pearl River Delta is the largest delta plain and the famous rice production base in South China. The formation and development of the soil is closely related to the formation and development of the delta and evolves with its evolution. That is mudflats or mangrove mangrove, the early reclamation of rice, the formation of marsh or acid salinization, salty paddy soil, with the extension of rice time, de-swamp, deacidification, desalination Continue to develop into a latent type and the type of paddy soil. During this development, fertility tends to decline naturally, but man-made farming and fertilization levels are the key factors that affect their fertility and developmental direction.