刈牧胁迫对高寒草甸牧草补偿生长的影响　  

Effects of cutting on forage compensatary growth in alpine meadow

作　　者：周秉荣[1] 马宗泰 李红梅 贺晓龙[3] 

机构地区：[1]青海省气象科学研究所,青海西宁810001 [2]青海海北牧业气象试验站,青海海晏810021 [3]青海大学农牧学院畜牧系,青海西宁810001

出　　处：《草业科学》2007年第4期79-83,共5页Pratacultural Science

基　　金：国家九五科技攻关项目"青海省环湖地区生态环境本底调查"资助

摘　　要：通过青海省环湖区高寒草甸草场天然牧草生长胁迫与再生力关系的试验研究,认为高寒草甸草场对生长胁迫的耐受、补偿能力较低海拔地区的弱,在遭受生长抑制后对不利天气的抵抗能力也减弱。牧草对刈割强度的补偿性生长表现为:轻度和中度刈割后牧草为超补偿生长,重度以上为欠补偿生长。放牧强度和放牧时间均为影响牧草再生能力的显著因子,并且放牧强度的影响要大于放牧时间的影响。The relationship between forage growth stress and re-growth ability in alpine meadow around Qinghai lake was studied. The authors thought that alpine meadow had weaker tolerance to growth stress and compensatory ability; its resistance to weather stress after suffering growth inhibition was also very weak. Forage could have an over compensatory growth after light and medium cutting; under-compensatory growth happened after heavy cutting. Grazing intensity and duration were significant factors affecting forage re-growth, the former had even bigger effect than the latter.

关 键 词：高寒草甸 补偿性生长 放牧强度 刈割 

分 类 号：S812[农业科学—草业科学]