不同砂梨品种根系形态的研究

Study on Root System Morphology of Different Chinese Pear Varieties

对爱甘水、幸水和丰水3个砂梨品种6年生盛果树不同土层内根系的总长、重量、平均直径,不同直径范围内的根长、表面积、总体积、根尖数、根叉数和根尖点等进行了比较试验,结果表明:不同土层内3个砂梨品种间根系生长状况存在明显差异。0～2mm直径的根系爱甘水、丰水多集中于20～30cm土层,而幸水则集中在40～50cm土层;3个品种大于5mm根系的重量所占比例均为最高;在0～10cm土层内爱甘水的根叉数、根尖条数和根尖点数均高于幸水和丰水,在0～20cm土层内,爱甘水的根系表面积和体积也明显高于幸水和丰水。

Taking the 6-year-old trees of three Chinese pear varieties'Aiganshui','Xingshui'and'Fengshui'as the tested materials,the comparative tests for the total length,weight and average diameter of the root system in different soil layers,as well as the length,surface area,total volume,number of root tips,number of root forks and root tip points of the root with different diameters were conducted.The results indicated that there was significant difference in the growth status of the root system in different soil layers among three Chinese pear varieties.The root system with 0-2 mm diameter of'Aiganshui'and'Fengshui'mainly fastened the 20-30 cm soil layer,while that of'Xingshui'mainly gathered in the 40-50 cm soil layer.For above 3 varieties,the weight of the root system whose diameter was more than 5 mm accounted for the highest percentage of the weight of all root system.In the 0-10 cm soil layer,the number of root forks,number of root tips and root tip points of'Aiganshui'were higher than those of'Xingshui'and'Fengshui'.In the 0-20 cm soil layer,the surface area and volume of'Aiganshui'were significantly higher than those of'Xingshui'and 'Fengshui'too.