作　　者： ; ;

机构地区： 甘肃草原生态研究所

出　　处： 《草业学报》 1994年第3期37-42,共6页

摘　　要： 在河西走廊地区建植碱茅（Ｐｕｃｃｉｎｅｌｌｉａｔｅｎｕｉｆｌｏｒａ－Ｐ．ｃｈｉｎｕｍｐｏｅｎｓｉｓ）人工草地，做收种和刈割兼用。撒播方式下，播量达２２．５ｋｇ／ｈｍ２时，种子落种数为２０００／ｍ２，田间出苗数７９４／ｍ２，出苗率为１３％，定苗数受地表积盐程度的影响（Ｐ＜０．０１），地表盐斑为５０％，９０％的幼苗数为９８８株／ｍ２和３０１株／ｍ２；碱茅草地盖度，种子产量和牧草产量均与土壤全盐含量呈负线性关系（ｒ－－０．８０５１，ｒ＝－０．８１５８，ｒ＝－０．９２９２），但种子发芽率和千粒重似乎不受立地土壤盐分的影响。由于受田间管理措施和碱茅自身发育节律的影响，生长第３年的草地盖度、种子产量和牧草产量均比第２年有不同幅度的下降，据此，适时灌水，加强施肥等田间管理措施对维持草地基况良好，获得高产有重要作用。 Puccinellia tenuiflora and P. chinampoensis mixture grassland has been established in success withbroadcasting measure(in which the sowing rate was22. 5 kg/ha)in hexi Corridor Inland Saline Area,andthe field seedling no。was 794 per m2,thus the emergen ce rate was then estimated at 13.0%, andmoreover,the seedling number was affected by the amount of surface salt accumulation(P<0.01);as thesalt stained areas were ranged from 50%to 90%,so that the seedling numbers at close of field examinationwere estimated at 988 and 301 plants per m2 respectively。Meanwhile,the soil salt content has finallyhitherto influenced the pasturing condition as well as seed and grass yieldage somewhat.there were negativecorrection in significant level existed among grass coverage,seed and grass yieldage and soil salt contents(r=-0.8051,-0. 839 and-0.933 respectively).The results showed that the germination rate of seedbatch and seed quality were not obviously affected by the soil salt contents,which might be influenced byfield managements and growth condition of the grass sp.P. tenuiflora in itself,the grass coverage ingrassland,seed and grass yieldage showed some increases in the third year’s growth when in comparisonwith those in the second year’s.In conclusion,the efficicnt managements were said to increase the seed andgrass yields after all。

关 键 词： 碱茅 建植 种子 产量 草地

领　　域： [农业科学]