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今年2月下旬我们用油菜品种“新107”进行了施花肥对比试验,每亩施20斤标准氮肥种25斤过磷酸钙,施肥时植株长势较差,三次重复平均产量是:施花肥的亩产175斤,未施花肥的只有120斤,增产45.8％。为什么增产比例这样大?我们分析了田间观察记录和室内考种结果,认为主要有如下两方面的因素:
In late February of this year, we used the rape variety “New 107” to compare fertilization with 20 kg of standard nitrogen fertilizer per acre and 25 kg of superphosphate fertilizer. When the fertilizer was applied, the growth of the plant was poor. The average yield of three replications was: Yield 175 pounds, no fertilizer only 120 pounds, an increase of 45.8%. Why the proportion of such a large increase? We analyzed the field observation records and indoor test results, that there are two main factors as follows: