黄河源区草地早熟禾生长节律的研究  

Study on Growth rhythm of poa pratensis in Yellow River Source Region

作　　者：杨时海[1] 马玉寿[2] 施建军[2] 王彦龙[2] 严青[1] 

机构地区：[1]青海大学研究生部,西宁810016 [2]青海省畜牧兽医科学院草原研究所,西宁810016

出　　处：《青海畜牧兽医杂志》2006年第4期8-10,共3页Chinese Qinghai Journal of Animal and Veterinary Sciences

基　　金：青海省重点科技攻关项目(2005_N_157)

摘　　要：通过对黄河源区草地早熟禾生长节律的研究,论述了草地早熟禾生育期、分蘖、株高及地上生物量的发育规律和动态。结果表明:草地早熟禾在海拔3 780m的果洛州玛沁县一般于4月下旬返青,9月上旬成熟,生育期为134d左右;分蘖数与单株分蘖数在成熟期达到最大分别为240株/0.25m2,7.5个/株,分蘖速率在成熟期最大为0.143个/株.d-1;株高到成熟期达到93.6cm,日均增高在拔节—抽穗期最大为2.33cm;地上生物量在成熟期达到最高为530g/m2,日均增重在拔节—抽穗期达到最大值为7.474g/m2。The growth rhythm of poa pratensis was studied in the Yellow River source region and the development regulation and dynamic of period of fertiliey , tiller, height of plant and above ground biomass of p. pratensis were discussed. The results were as follows ： The p. pratensis beans to be green up on the last ten days of April and ripeness of seed on the last ten days of September in the Maqin County of Guoluo Tibetan prefecture of Qinghai Province, the whole period of fercility meeds about 134days . The maximum value of tiller and ramet was 240 branches /0.25m^2 and 7.5 branch / branch, respectively, in the period of ripeness of seed, the maximum value Of tiller rate was 0. 143 branch/paint·d^-1 in the filling period .the height of plant was 93.6cm in the period of ripeness of seed . The above ground biomass was 530g/m^2 in the period of ripeness of seed .The average value of day height and weight gain that reached peak was 2.33cm/d and 7.47g/m^2. d^-1 in the joint - earing period , respectively.

关 键 词：黄河源区 草地早熟禾 生长节律 分蘖 株高 地上生物量 

分 类 号：S543[农业科学—作物学]