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对云南省南亚热带湿热地区的思茅曼中田畜牧场臂形草草场不同定植年限中每年施氮素与否对草场的产草量及养分含量的影响进行了调查和统计分析。结果表明：通过每年施氮肥，能明显地提高全草场的产量和质量，如以１９８６年（１２０）＊与１９８６（０）＊两不同处理在定植的第五年进行比较，一次刈割测产的干物质产量每公顷可提高达１４７．２％、粗蛋白含量则提高２３３．７％，处理间均可达到极为显著的差异（Ｆ＝９．９０＞Ｆ０．０１＝３．３６）。后随着年限的推移，施氮肥的草场产量可保持一定的稳定性之后，再出现稳中有降，而不施氮肥的处理则在定植的第三年急剧下降。为此作者等提出了试验见解，希望对曼中田以及其类似地区禾本科草场的管理上能起到一定生态循环系统的指导作用，并为抑制害草飞机草的孳生危害提供措施。
The effects of annual N application or not on the grass yield and nutrient content of Arboretum pasture in Zhongmaitou pasture in the south subtropical humid and warm area of Yunnan Province were investigated and statistically analyzed. The results showed that the yield and quality of the whole grassland could be significantly increased by applying nitrogenous fertilizers each year. For example, in 1986 (120) * and 1986 (0) * two treatments were compared in the fifth year after planting, The dry matter yield increased by 147.2% per hectare and the crude protein content increased by 233.7%, with extremely significant differences among treatments (F = 9.90> F0.01 = 3.36). With the passage of years, the yield of pasture with nitrogen fertilizer can maintain a certain stability, and then decline steadily, while the treatment without nitrogen fertilizer dropped sharply in the third year of planting. The author put forward the experimental opinion for this reason, hoping to guide the management of grassland in Manzhong and its similar areas to some extent, and to provide measures to restrain the harm of grass-grasses.