CAJ | 학술논문

选取黄土高原5个地区杜松（ Juniperus rigida ）种子，采用种子萌发实验及相关分析的方法，研究其大小特征、萌发特性及其与生态因子的相关性，以了解不同地区杜松的种子萌发特性。结果表明，不同地区杜松的种子大小差异显著，府谷地区的种子最大、最重，平均长6．83mm，宽3．56mm，千粒重为25．89g；种子长及种子长宽比随纬度的升高、土壤全磷含量的增加而变小；种子千粒重随1月和7月均温的增加而增加，随土壤有机质、速效磷、全氮含量的增加而减少。种子大小对萌发特征影响显著，种子萌发率、萌发势及发芽指数均随种子长、种子长宽比的增加呈减小的趋势。不同地区杜松的萌发差异显著，武川的种子萌发最快最高，府谷与贺兰山最慢、最低；萌发率、萌发势及发芽指数均随纬度的升高而增加，萌发势和发芽指数随土壤全磷含量的增加而增加。研究认为武川及浑源地区是杜松优良的选种地。
선취황토고원5개지구두송（ Juniperus rigida ）충자，채용충자맹발실험급상관분석적방법，연구기대소특정、맹발특성급기여생태인자적상관성，이료해불동지구두송적충자맹발특성。결과표명，불동지구두송적충자대소차이현저，부곡지구적충자최대、최중，평균장6．83mm，관3．56mm，천립중위25．89g；충자장급충자장관비수위도적승고、토양전린함량적증가이변소；충자천립중수1월화7월균온적증가이증가，수토양유궤질、속효린、전담함량적증가이감소。충자대소대맹발특정영향현저，충자맹발솔、맹발세급발아지수균수충자장、충자장관비적증가정감소적추세。불동지구두송적맹발차이현저，무천적충자맹발최쾌최고，부곡여하란산최만、최저；맹발솔、맹발세급발아지수균수위도적승고이증가，맹발세화발아지수수토양전린함량적증가이증가。연구인위무천급혼원지구시두송우량적선충지。
In the present study ,the biological characteristics of seed germination were investigated for five typical populations of Juniperus rigida growing in different regions of the Loess Plateau ,and their relation with climatic and soil factors were studied .The results showed significant difference in seed size among the five regions ,with Wuchuan being the smallest with respect to seed length (6 .83 mm ) ,width (3 .56 mm ) ,and seed weight (25 .89 g ) .Seed length and ratio of length/width decreased as latitude and soil total phosphorus content increased .Seed weight increased with in-creased mean temperature in January and July ,but decreased with increased organic matter ,available phosphorus and to-tal nitrogen of soil .There was a significantly negative correlation between germination and seed size .Seed germination differed among regions ,with Wuchuan region being the fastest and highest whereas Fugu the slowest and lowest .Germi-nation rate ,germination energy and germination index increased with latitude .Additionally ,Wuchuan and Hunyuan are suitable for growing Juniperus rigida .