刈割次数对南方冬闲田种植黑麦草产量及品质的影响

目的]研究刈割次数对黑麦草产量和品质的影响。方法]以大田栽培的黑麦草为试验材料，分别对其进行不同的刈割处理（①：刈割1次；②：刈割2次；③刈割3次；④：刈割4次），比较不同处理黑麦草的产量、再生能力及营养品质（粗蛋白、粗脂肪、粗灰分含量）的影响。结果]处理③黑麦草的鲜草、干草、粗蛋白产量最高（分别为80．3、9．80、2．40t／hm^2），分别为处理①、②、④的2．18、1．02、1．21倍，2．28、1．24、1．47倍及2．79、1．24、1．30倍；处理②、③黑麦草的再生能力较强；处理③黑麦草的营养品质最好，其粗蛋白、粗脂肪、粗灰分含量分别为24．4697％、6．1283％、14．9103％。结论]刈割3次黑麦草的产量最高、营养品质最好。

Effects of Cutting Times on Yield and Quality of Lolium multiflorum Planted in Winter Fallow Field in South China

Objective] The aim was to study the effects of cutting times on yield and quality of Lolium multiflorum. Method] With L. multiflorum planted in field as the tested material, it was cut with different cutting times (①:cutting 1 time;②:cutting 2 times;③:cutting 3 times;④:cutting 4 times). The yield, regeneration ability and nutritional quality (contents of crude protein, crude fat and crude ash) of L. multiflorum in different treatments were compared. Result] The yields of fresh grass, dry grass and crude protein of L. multiflorum in treatment ③ were the highest (being 80.3, 9.80, 2.40 t/hm~2 resp.), being 2.18, 1.02, 1.21 times,2.28, 1.24, 1.47 times and 2.79, 1.24, 1.30 times of those of L. multiflorum in treatments ①, ②, ④. The regeneration ability of L. multiflorum in treatments ② and ③ were stronger. The nutritional quality of L. multiflorum in treatment ③ was the best with contents of crude protein, crude fat and crude ash of 24.469 7%, 6.128 3% and 14.910 3% resp. Conclusion] The yield of L. multiflorum which was cut 3 times was the highest with the best nutritional quality.