刈割期和留荐高度对新麦草产草量及品质的影响

１９９９年５月～９月在华北农牧交错带研究生育期和留荐高度对新麦草产草量及品质的影响，结果表明，以抽穗期刈割头荐留荐４ｃｍ全年割三次的干草总产量最高，（２０６０．５１ｋｇ／ｈｍ＾２），其次是初花期刈割头荐留荐１０ｃｍ（１９５１．８４ｋｇＤＭ／ｈｍ＾２），粗蛋白质总产量最高的处理是抽穗期刈割头荐留荐４ｃｍ（４７０．２９ｋｇＤＭ／ｈｍ＾２０，其次是初花期头荐刈割，留荐４ｃｍ（４２４．２６ｋｇＤＭ／ｈｍ＾

The Effect of Different Stubble Heights and First Clipping Period on the Yield and Quality of Russian Wildrye Pasture

The experiments were conducted at Yuershan Farm of Chengde on the border of crop and range regions in the north of China from May to September in 1999. The effects of different first clipping periods and stubble heights in three clipping times on Russian wildrye pasture indicated that: the total yield of Russian wildrye pasture was highest (2060.5kg/hm 2) clipping firstly in the heading stage and 4 cm stubble, and treatment clipping firstly in earlier anthesis and 10cm stubble was secondly (1951.84 kg/hm 2); The crude protein total yield of Russian wildrye pasture was highest (470.29kg/hm 2) clipping firstly in the heading stage and 4 cm stubble treatment, and clipping firstly in earlier anthesis and 4 cm stubble was secondly(424.26 kg/hm 2); The ADF and NDF contents of forage in treatment of 4 cm stubble were lowest. The general trend of ADF and NDF contents of forage in treatments of first clipping stage was full bloom >heading stage>eralier anthesis. Russian wildrye should be used in earlier stage(heading stage) and lower stubble(4 cm stubble).