论文部分内容阅读
通过小区模拟试验,研究不同比例砒砂岩与沙复配对作物产量及成土理化性质的影响,寻找适宜作物生长的最佳混合比例。砒砂岩与沙混合比例共设3个处理:1:1(C1)、1:2(C2)和1:5(C3),每处理重复3次,种植作物为冬小麦。试验结果表明:小麦产量以C3处理增产效果最佳,比C2处理增产4.4%,比C1处理增产8.7%。新复配土壤容重C3>C2>C1,水稳性团聚体C1>C2>C3,有机质C3>C2>C1。种植一季作物后各处理土壤容重均有所下降,水稳性团聚体均有所升高,有机质C1、C2处理有所提高,C3处理稍有下降,土壤养分含量除有效磷外,全氮、速效钾及有机质均处于极低水平,在随后的推广应用中应不断加大氮肥和钾肥的投入,增施有机肥,提高复配土壤的养分水平,从而达到新增耕地的可持续利用。该研究可为毛乌素沙地的开发利用、沙化土壤的治理以及当地水土流失的防治提供理论依据和技术支撑。
Through the plot simulation test, the effects of different ratios of sandstone and sand compounding on crop yield and soil physicochemical properties were studied to find out the best proportion of suitable crop growth. A total of three treatments were mixed with sand and sand: 1: 1 (C1), 1: 2 (C2) and 1: 5 (C3). The treatments were repeated 3 times and the crop was winter wheat. The results showed that the yield of wheat increased best with C3, 4.4% more than C2 and 8.7% more than that of C1. The soil bulk density of the new compound C3> C2> C1, water stable aggregates C1> C2> C3, organic matter C3> C2> C1. The soil bulk density of all treatments declined after planting a crop, the water stable aggregates increased, the organic matter C1 and C2 treatments increased slightly, and the treatment of C3 decreased slightly. The content of soil nutrients in addition to available phosphorus, total nitrogen, Available potassium and organic matter are in a very low level, in the subsequent promotion and application of nitrogen and potassium fertilizer should continue to increase the input of organic fertilizer, increase the level of nutrients in the compound soil so as to achieve the sustainable use of new cultivated land. The study can provide theoretical basis and technical support for the development and utilization of the Mu Us desert, the treatment of desertified soil and the prevention and treatment of local soil erosion.