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近几年来,许多地区利用间套空隙,插种短期绿肥,增加肥料来源,但在试验推广过程中,夏播短期绿肥柽麻的肥效不稳定,有些地方效果很好,有些地方无效或效果不大。如我所1973年在乾县临坪公社枣新大队,种植20多亩柽麻,亩产鲜草2000斤以上,其肥效在后作小麦中未明显表现出来,因此,有必要研究提高柽麻肥效的途径。1974—76年我们在柽麻结合施用氮磷化肥方面开展了试验,并取得了成果,现将结果整理如下:一、试验情况及方法试验于1974—76年在洛南县农村基点进行。该县为丘陵山区,气候冷凉,历来是以春玉米为主的一年一熟制。1970年来,推行
In recent years, intercalary gaps have been used in many areas to intercalate short-term green manures and increase the sources of fertilizers. However, during the experiment and promotion process, the fertilizer efficiency of summer sowing short-term green manures is not stable, and the effect is good in some places and invalid or ineffective in some places Big. As I was in 1973 in the county Linping jujube brigade, planting more than 20 mu of flax, acres of fresh grass yield more than 2000 pounds, the fertilizer effect in the latter for the wheat did not show clearly, it is necessary to study to improve the flax Fertilizer way. In 1974-76, we conducted experiments on the combined application of nitrogen and phosphorus fertilizer and the results were obtained. The results are summarized as follows: I. Tests and Methods The experiment was conducted in rural areas of Luonan County in 1974-76. The county is a hilly region, cold climate, has always been based on spring corn-year cooked system. Since 1970, implemented