华南红壤山地人工草地施肥试验

Fertilizer Application on the Artifical Grassl and in the Red-earth Mountain in Southof China.

人工草地施肥试验的结果表明，在亚热带红壤丘陵山地立地条件较差的情况下，人工草地建植当年适宜的施肥组合是Ｎ＿（６９）Ｐ＿（５４），干草产量每公顷可达５３３７．５ｋｇ，且增施磷肥的作用比较明显；翌年，以Ｎ＿（２０７）Ｐ＿（５４）为好，每公顷产量可达９０８８．９ｋｇ，但氮肥的影响较大，氮、磷肥混合施用的效果显著高于（Ｐ＜０．０１）二者单施的肥效。增施氮肥能改善牧草品质，提高其饲用价值。铜、锌、硼肥无论单施还是混施，对牧草产量的提高均无显著影响（Ｐ＞０．０５）。

The resLilt of fertilizer application study on the artifical grassland shows : In the firstyear of pasture estabishment,the best fertilizer composition is N_(69)P_(54), Hay yield can get5337. 5 kg/ha on the poor soil condition in the stibtropical red-earth mountains. The ef-fect of increasing P fertilizer is obviotis.The fertilizer compnsition of N_(207)P_(54) is the bestin the next year, Hay yield can get 9088. 9 kg/ha, N fertilizer plays a more importantpart than P fertilizer.The efficiency of compound fertilizer of N ana P is higher that ofPor along(P<0,0.The qtiality of forage can be imporved and the feeding value canbe raised. Application of Cu、Zn、B, along or in compound form, has no obvious ef-fects on hay yield.