施肥水平和不同株高刈割对王草产量和品质的影响

生长第1年不同刈割株高的王草Pennisetum purpureum×P.typhoideum年产草量随刈割株高增高呈增加趋势，刈割株高220 cm时鲜草、风干草产量最高，产量受施肥影响很大。茎叶比与刈割株高之间存在显著的相关性，其受施肥影响较小。营养物质中，粗蛋白、粗脂肪、粗灰分含量均随刈割株高的增加而降低，粗蛋白含量和刈割株高之间存在极显著的线性负相关，钙含量和中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)、酸性洗涤木质素(ADL)含量则随着刈割株高增加而呈增加趋势，与刈割株高呈显著正相关。从草产量、粗蛋白含量和产量角度来评价，生长第1年的王草在株高为100 cm施肥时刈割利用价值最高。

The influence of fertilization and mowing height on King grass yield and quality

he yield of one year King grass(Pennisetum purpureum×P.typhoideum) showed increasing trend with the increase of mowing height; Fresh and dry yield were the highest at 220 cm mowing height, and fertilizer effect was significant. The ratio of stem and leaf showed significantly linear correlation with mowing height and little effect from fertilizer. The content of CP, EE and Ash was declining with the increasing mowing height, and the content of CP is significantly negative correlated with mowing height. The content of NDF, ADF, ADL and Ca showed increasing trend with the increasing mowing height. Evaluated from yield, nutrition content and digestibility, fertilized one year King grass had the highest utilization value at 100 cm mowing height.