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公布了松树种子在微量元素溶液中作播种前浸种的试验结果。在0.02%硫酸亚铜溶液,0.03%的硫酸锌溶液和0.005%—0.01%硫酸镍溶液中浸种12小时效果是最好的。萨拉托夫省的林学家们为1971—1975年发展国民经济五年计划预定的建立国有林新的林分,需要完成大量工作。为此,需要大量高质量的种苗。但是,到目前为止萨拉托夫省每单位面积的种苗产量远不能令人满意。标准苗的实际产量平均在36—89%之间。
Published pine seed in the trace element solution for sowing before sowing test results. It is best to soak in 0.02% cuprous sulfate solution, 0.03% zinc sulfate solution and 0.005% -0.01% nickel sulfate solution for 12 hours. Forest scientists in the Saratov region have set out to build a new state-owned forest reserve for the five-year plan for the development of the national economy in 1971-1975, and much work needs to be done. For this reason, a large number of high-quality seedlings are required. However, so far the output of seedlings per unit area in Saratov province is far from satisfactory. The actual production of standard seedlings average between 36-89%.