论文部分内容阅读
两年来,农一师所属各场,大面积培育桑苗获得了较大成绩。但是,到目前,对于桑树栽植季节问题,看法还不一致。为此,我们对上游水库地区去秋和今春栽的桑苗作了调查,结果是:秋栽成活率44.7％,春栽13.3％。 上游水库地区,地下水位高,土壤盐碱重,土质粘重,而前两者又与水库的蓄水量有直接关系。据统计资料,水库每年三月到四月初蓄水量最大,四月中旬以后逐渐减少,地下水位和土壤含盐量则随水库蓄水量的增减而升降。例如,今年三月二十三日调查,地下水位为5了厘米,0—60厘米土层总盐达1.15％;到五月十日,地下水位则下降至74厘米,0—60
In the past two years, all fields affiliated to Nongyi Division have gained great achievements in cultivating Sangmiao in a large area. However, up to now, the view of the mulberry planting season is not the same. To this end, we surveyed the upstream reservoir areas to autumn and spring mulberry seedlings, the result is: survival rate of autumn planting 44.7%, spring planting 13.3%. In the upstream reservoir area, groundwater level is high, soil salinity and alkalinity are heavy, soil quality is heavy, and the former two are directly related to reservoir water storage capacity. According to statistics, the reservoir accumulates the largest amount from March to April every year and gradually decreases after mid-April. The water table and soil salinity rise and fall with the increase or decrease of reservoir water storage. For example, on March 23 this year, the groundwater table was 5 centimeters and the total salt content in the 0-60 cm soil layer was 1.15%. By May 10, the groundwater table dropped to 74 centimeters and the scale of 0-60