The Seedling And Planting Technology Research Of Leymus Chinensis In Arid Sandy Area Of Ningxia

The experiment in Section 2 of Leymus chinensis as the experimental materials. In the field setting 8 kinds of planting pattern, three ways of sowing,4 kinds of sowing depth and four irrigation system of Leymus chinensis emergence, seedling survival and growth of research, at the same time, the investigation and control experiment and on the base of the artificial Leymus chinensis weed. Under different treatments of Leymus chinensis seedling emergence rate, seedling survival rate, morphology growth index, physiological and biochemical index and soil moisture through the comprehensive analysis, comparison of every kind of treatment of Leymus chinensis seedling survival and growth of, in order to find the best, for future generations of Ningxia arid sandy area of Leymus chinensis Seedling and planting techniques provide scientific basis. The main results are as follows:1. All planting patterns were produced on branch No.2 of Leymus chinensis seedling emergence time, emergence rate, seedling survival rate and post growth promoting or inhibiting effect.8 kinds of planting pattern to promote the worst effect size sorting is covered with black film (Film Uncovering)> ridge covering tunica albuginea> ridging with no mulching> cover with grass curtain> black film on demand (not to expose the film)> covering tunica albuginea (Film Uncovering)> blank drilling> the tunica albuginea on demand (not to expose the film), namely the tunica albuginea on demand (not to expose the film) planted, covered with black film (Film Uncovering) planting is the best way. Sowing is the best way to drill, followed by the demand, the worst is to sow. The best sowing depth of the experiment was 3cm.2. In Yanchi of arid aeolian sand region in the new reclaimed wasteland plantation of Leymus chinensis, the seedling stage each 2 day irrigation 15mm, growth period every 10 day spray irrigation 40mm irrigation system is best.3. Base mainly on the species, quantity and weed community of weed species, and the weed community was not obvious with the seasons.. Many kinds of concentrated in the grass, Euphorbiaceae, Amaranthaceae and Chenopodiaceae, Zygophyllaceae and other 5 families, accounted for 73.5% of the total amount of weeds. The largest number, the most harmful weeds, Eragrostis Setaria, wheatgrass, P.Tricuspidata, Tribulus and insect real 6. Glyphosate, trifluralin and 2,4-D mixture of 30d strain control effect can reach 85.7, the best effect on weed control. In the production of Leymus chinensis before sowing, selection of glyphosate, trifluralin and 2,4-D mixed spraying weed control.