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1999年 5月～ 9月在华北农牧交错带研究生育期和留茬高度对新麦草产草量及品质的影响。结果表明 ,以抽穗期刈割头茬留茬 4cm全年割三次的干草总产量最高 ,(2 0 60 .51kg/hm2 ) ,其次是初花期刈割头茬留茬 1 0 cm(1 951 .84kg DM/hm2 )。粗蛋白质总产量最高的处理是抽穗期刈割头茬留茬 4cm(470 .2 9kg DM/hm2 ) ,其次是初花期头茬刈割 ,留茬 4cm(42 4 .2 6kg DM/hm2 ) ,后者的酸性洗涤纤维和中性洗涤纤维含量均最低。头茬刈割期酸性洗涤纤维和中性洗涤纤维含量依次为盛花期 >抽穗期 >初花期。在河北坝上地区新麦草应在抽穗期低留茬(4cm)刈割为宜
Effects of Growth Duration and Stubble Height on the Yield and Quality of New Wheatgrass in the Ecotone between Agriculture and Animal Husbandry in North China from May to September, 1999. The results showed that the total hay yield was the highest (2060.51kg / hm2) and the first was the first flowering cuttings stubble stubble (1095 cm). 84kg DM / hm2). The crude protein with the highest total yield was 4 cm (470.229 kg DM / hm2) at the heading stage, followed by the first cropping stage at 4 cm (42.426 kg DM / hm2) The latter acidic detergent fiber and neutral detergent fiber content were the lowest. The first crop clippings acidic detergent fiber and neutral detergent fiber content were flowering stage> heading stage> flowering stage. In Hebei Bashang region of wheat straw should be low stubble heading (4cm) cutting is appropriate