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通过室内试验,研究膜孔肥液自由入渗中土壤容重对土壤含水率、土壤硝态氮和铵态氮的分布以及均匀性的影响.结果表明:土壤含水率和土壤铵态氮以膜孔为中心逐渐减小,而土壤硝态氮以膜孔为中心先增大后减小;土壤容重越大,土壤含水率、土壤硝态氮和铵态氮在水平方向和垂直方向分布的距离越小,肥液的累积入渗量越小;土壤容重越大,土壤含水率和土壤硝态氮分布的均匀性系数越小,而土壤铵态氮分布的均匀性系数越大.这为研究膜孔肥液灌溉技术奠定了基础.
The effects of soil bulk density on the soil moisture content, the distribution and uniformity of soil nitrate and ammonium nitrogen in the free-infiltration of film-hole fertilizer solution were studied through laboratory experiments.The results showed that the soil moisture content and the soil ammonium nitrogen content were as follows: While the nitrate content in soil first increased and then decreased with the increase of membrane pore size. The greater the soil bulk density, the greater the soil bulk density, the greater the soil moisture content, the greater the distance between soil nitrate and ammonium nitrogen in the horizontal and vertical distribution The smaller the cumulative infiltration of small and fluid fertilizer, the greater the soil bulk density, the smaller the uniformity coefficient of soil water content and soil nitrate nitrogen distribution, and the greater the uniformity coefficient of soil ammonium nitrogen distribution. Hole fertilizer irrigation technology laid the foundation.