毛乌素沙地臭柏种子产量及更新的初步研究

A PRELIMINARY STUDY ON THE SEED YIELD AND REGENERATION OF SABINA VULGARIS IN MAOWUSU SAND

臭柏（Ｓａｂｉｎａｖｕｌｇａｒｉｓ）又名叉子园柏、沙地柏等，柏科，园柏属，常绿匍匐针叶灌木。臭柏主要分布在温带大陆性干旱、半干旱区的山地、黄土丘陵及沙地上。臭柏以其适应范围广、枝叶茂密、萌芽和萌蘖能力强、枝条沙埋或触地后即可萌发不定根等特性，不断扩大...

Using the sample survey, this paper presents the results of a research on the fruit yeild, seeds hidden under ground, and number and distribution of seedlings. The results show that cones of Sabina vulgaris are mainly distributed within 3 metres around the centre of bush of S.vulgaris . There are usually 1506 seeds under the bush of S.vulgaris, but their fine seed rate are only 25.84 per cent. Although 3～9 seedlings per square metres distributed averagely under S.vulgaris bush at the moist interdune lowlands and the foot of sand dune where ground water table is 40～60cm, water content in surface soil 16.7%, and the depth of litter layer 1～3cm. These seedlings are usually 1～3-year-old and their natural regeneration is difficult. The seedlings of S.vulgaris always regenerate at moist bottomland where some plants such as Salix cheilophila bushes are growing, the bottomland has seasonal water, and the surface soil water content is about 30%. The ages of these seedlings are different and their natural regeneration is easy. The seeds are spread mainly from the bush of S.vulgaris to the sand by the sand run-off. and then spread to other bushes by wind, run-off,birds, of animal.