论文部分内容阅读
利用氮肥——牧草产量反应回归方程式,可确定吉林西部不同肥力天然羊草草场最高产量所需氮肥施量和最佳经济施肥量。结果表明,不同肥力草场的极限施氮量为11.98～12.88公斤/亩,最佳施氮量为4.13公斤/亩。
Using nitrogen fertilizer - forage yield response regression equation, we can determine the amount of nitrogen fertilizer and the best economic fertilizer for the highest yield of natural Leymus chinensis grassland with different fertility in the west of Jilin Province. The results showed that the limit nitrogen application rate of different fertility grasslands was 11.98 ~ 12.88 kg / mu and the optimum nitrogen application rate was 4.13 kg / mu.