Effects Of Traits And Productivity For Chernozem By Cultivation And Irrigation Practices

Chernozem is a high organic matter content, soil nutrient adequate soil, But with the erosion of agricultural reclamation of the natural environment,making a serious decline in soil fertility, soil salinization exacerbated, that make chernozem become "barren land." Therefore, a reasonable cultivation and irrigation measures the correct use of protective chernozem this rare resource is imminent.In this experiment, HeilongjiangZhaozhou Er Jingzhen chernozem soil was for something. Experimental set up five model through different cultivation methods, different irrigation methods, sub shallow soil (0～10cm), in soil (10～30cm) and deep soil (30～50cm). At different times of the dynamic changes in soil characteristics and distribution of soil moisture, soil temperature, soil conductivity and soil nitrogen content and other physical and chemical properties, analyze the impact of different cultivation patterns and irrigation methods on corn yield, to understand the different modes of corn yield. By trying different cultivation irrigation mode, select the best mode of water-saving, high yield and quality. Meanwhile depth study of the application of drip irrigation under way for agricultural production practices play a guiding role in promoting the realization of sustainable development of agriculture plays an important role. The results show that:From the physical nature of the comparison:(1) Temperature:soil temperature in the soil profile, shallow soil from10cm, middle earth30cm,50cm deep soil gradually decreased, while with decreasing temperature, the temperature of the soil layers with the growth period goes on decreasing.(2) soil moisture in the corn throughout the growth period, soil moisture from the soil profile to a depth shallow soil substantially decreased after the first increase in10-30cm soil layer moisture maximized. Single mode ridge double seedlings+Drip Irrigation water content of each soil layer is higher than the other modes. Between the different layers of soil fertility period of soil moisture content in each mode or less.(3) conductivity, seedling seedlings mode for each single-row soil ridge soil conductivity is lower than the single mode ridge double seedlings+Drip Irrigation, drip irrigation under various soil can reduce soil conductivity, are not covered for film mode with in-depth profiles of soil conductivity decreased, but after the first drop Drip Irrigation soil electrical conductivity increases. For comparison jointing stage after removing film coating, soil conductivity heading soil conductivity of soil conductivity compared to each film has been elevated slightly.(4) bulk density, Drip Irrigation can reduce soil bulk density, soil bulk density is one of four modes1.193g/cm-3, compared to a model without film fell5.63percent, lower soil bulk density can improve soil aeration, promote microbial growth, improve crop root absorption of soil moisture and nutrients.From the chemical nature:soil ammonium and nitrate content of different layers of soil under different irrigation during each mode from shallow to deep soil soil showed a decreasing trend, the pattern of soil ammonium Drip Irrigation nitrogen and nitrate nitrogen content compared to non-low pattern coating. Ammonium nitrogen content of the soil as the soil is not easily reduced leaching, and the loss of soil nitrate leaching the soil with more.From the point of view modes yield corn yield five highest13730.22Kg/hm-1, compared to model one of10522.73Kg/hm-1increase1744.98Kg/hm-1, two-phase model is similar to the mode of production is13196.96Kg five/hm-1, derived from the analysis of the economic benefits of the highest economic model Ⅱ, because of the high cost of equipment sprinkler hour, comprehensive analysis, two single-mode single-row ridge seedling, Drip Irrigation in the jointing stage do Jiemo deal with the highest economic returns.