新疆瘠薄土壤地区果蔬种植中最佳养分供给条件的试验研究

Experimental Study on Optimal Nutrient Supply Conditions in Vegetable Planting Area of Barren Soil

现代农业是向规模化与集约化的形式发展,由于大量有机化肥的使用,使土壤中有机养分逐渐降低,因此以新疆瘠薄土壤为研究方向,通过实验方式制备生物有机肥料为该地区果蔬种植提供最佳土壤养分条件。首先,以花生饼和菜籽饼为主要原料,以醛渣、酒糟、鸡蛋壳及菌种为辅料发酵成为基质微生物复合有机肥料,利用重铬酸钾测定上述有机肥料的有机质含量,并采用凯氏定氮仪、碱熔-钼镝抗比色法及吸收分光光度法等方法检测各肥料中的全氮磷钾等元素含量;然后,在实验区域种植番茄后并施加花生饼肥料、菜籽饼肥料及有机化肥,结果显示施肥后土壤中的有机生物质、土壤酶活性及其他性质酶活性等养分明显增加,且该蔬菜中硝酸盐含量低于化肥施肥果实。

With the continuous improvement of the mechanical properties of super high-rise buildings,the application of steel-concrete composite structures to the building can meet the needs of seismic and other aspects. Therefore,the steel concrete composite structure is taken as the object of study. The axial compression test of concrete filled steel tubular short columns and long columns with different reinforcement is used to investigate the change of its compressive strength. First of all,based on the unified theory, the steel-concrete composite structure is used as a separate material to obtain the compressive strength performance index of the composite structure. Considering the effects of reinforcement condition,the axial compressive strength formula can be obtained by combination of different reinforcement and concrete( concrete) compressive strength after combination,and through the combination of axial compression bearing capacity of strength in the force under the different conditions of reinforced concrete pipe is deduced; secondly,the use of circular reinforced concrete filled steel tubular columns subjected to axial loading the experiment,including 4 reinforced concrete short columns and 1 unreinforced concrete short columns and 2 reinforced concrete columns and 1 reinforced concrete columns. Through the experiment, the bearing capacity of short columns can be informed of the reinforcement ratio and stirrup distance for long columns can be informed of the reinforcement ratio on the impact the bearing capacity.