为了探究西藏林芝河谷地带紫花苜蓿(Medicago sativa L.)与高羊茅(Festuca elata Keng ex E.Alexeev)混播对草地产量和牧草品质的影响,以单播为对照,采用随机区组设计,测定了不同茬次牧草的生产性能和营养指标。结果表明:混播干草产量...为了探究西藏林芝河谷地带紫花苜蓿(Medicago sativa L.)与高羊茅(Festuca elata Keng ex E.Alexeev)混播对草地产量和牧草品质的影响,以单播为对照,采用随机区组设计,测定了不同茬次牧草的生产性能和营养指标。结果表明:混播干草产量分别达14917.05 kg·hm^(-2),13288.82 kg·hm^(-2)和8729.86 kg·hm^(-2),显著高于单播产量。牧草混播第1至3茬的粗蛋白质含量分别为14.07%,13.62%和20.50%,显著高于单播高羊茅,低于单播紫花苜蓿;平均粗脂肪含量达2.24%,显著高于单播处理。牧草干重与粗纤维含量呈极显著正相关,与粗脂肪含量呈显著正相关关系,与粗蛋白质含量呈显著负相关关系。不同处理(茬次)灰色关联度综合评价排序结果为A3>B3>C1>A1>A2>B2>B1>C2>C3。2种牧草混播具有一定的优势,可在林芝河谷地带广泛栽培推广和利用。展开更多
The storage and chemical properties of the forest litter in dark coniferous forest of Sejila Mountain were studied. The results showed that the existing storage was 5.863t·hm -2 and the annual litter fall was 0.3...The storage and chemical properties of the forest litter in dark coniferous forest of Sejila Mountain were studied. The results showed that the existing storage was 5.863t·hm -2 and the annual litter fall was 0.3205 t·hm -2 . It implied that the forest litter decomposed slowly and accumulated quickly, and the turnover of nutrient circles was slow. The contents of N, Ca, Na, and Mn nutrient elements in litter layer were in the order of un-decomposed layer (U layer) abstract > semi-decomposed layer (S layer) abstract > decomposed layer (D layer) abstract, those of K, Fe, and Mg were in the order of D layer > S layer > U layer, and P element content was in the order of U layer > D layer > S layer. The pool of elements was 78.483 kg·hm -2 N, 3.843 kg·hm -2 P, 48.205 kg·hm -2 K, 23.115 kg·hm -2 Ca, 13.157 kg·hm -2 Na, 30.554 kg·hm -2 Fe, 2.113 kg·hm -2 Mn and 27.513 kg·hm -2 Mg. The turnover of forest litter was the total of nutrient release accumulation. K, Fe, and Mg were enriched, and N, Ca, Na, Mn, and P were released with the turnover rate in the order of N > Ca > Na > Mn >P.展开更多
文摘为了探究西藏林芝河谷地带紫花苜蓿(Medicago sativa L.)与高羊茅(Festuca elata Keng ex E.Alexeev)混播对草地产量和牧草品质的影响,以单播为对照,采用随机区组设计,测定了不同茬次牧草的生产性能和营养指标。结果表明:混播干草产量分别达14917.05 kg·hm^(-2),13288.82 kg·hm^(-2)和8729.86 kg·hm^(-2),显著高于单播产量。牧草混播第1至3茬的粗蛋白质含量分别为14.07%,13.62%和20.50%,显著高于单播高羊茅,低于单播紫花苜蓿;平均粗脂肪含量达2.24%,显著高于单播处理。牧草干重与粗纤维含量呈极显著正相关,与粗脂肪含量呈显著正相关关系,与粗蛋白质含量呈显著负相关关系。不同处理(茬次)灰色关联度综合评价排序结果为A3>B3>C1>A1>A2>B2>B1>C2>C3。2种牧草混播具有一定的优势,可在林芝河谷地带广泛栽培推广和利用。
文摘The storage and chemical properties of the forest litter in dark coniferous forest of Sejila Mountain were studied. The results showed that the existing storage was 5.863t·hm -2 and the annual litter fall was 0.3205 t·hm -2 . It implied that the forest litter decomposed slowly and accumulated quickly, and the turnover of nutrient circles was slow. The contents of N, Ca, Na, and Mn nutrient elements in litter layer were in the order of un-decomposed layer (U layer) abstract > semi-decomposed layer (S layer) abstract > decomposed layer (D layer) abstract, those of K, Fe, and Mg were in the order of D layer > S layer > U layer, and P element content was in the order of U layer > D layer > S layer. The pool of elements was 78.483 kg·hm -2 N, 3.843 kg·hm -2 P, 48.205 kg·hm -2 K, 23.115 kg·hm -2 Ca, 13.157 kg·hm -2 Na, 30.554 kg·hm -2 Fe, 2.113 kg·hm -2 Mn and 27.513 kg·hm -2 Mg. The turnover of forest litter was the total of nutrient release accumulation. K, Fe, and Mg were enriched, and N, Ca, Na, Mn, and P were released with the turnover rate in the order of N > Ca > Na > Mn >P.
