Table 3.

The root length density of different types of sea-buckthorn.

		Horizontal direction
Vertical direction			0–20 cm		20–40 cm			40–60 cm
		4y	15yN	15yH	4y	15yN	15yH	4y	15yN	15yH
	0–20 cm	824 ± 66a	388 ± 34b	195 ± 10c	754 ± 68a	535 ± 29a	211 ± 19b	307 ± 24b	601 ± 70a	189 ± 10c
	20–40 cm	287 ± 17b	425 ± 13a	142 ± 16c	258 ± 29a	148 ± 8b	142 ± 16b	250 ± 23a	216 ± 25a	47 ± 3b
	40–60 cm	95 ± 10b	138 ± 9a	117 ± 8ab	97 ± 10a	122 ± 13a	36 ± 4b	108 ± 5a	93 ± 3a	34 ± 5b

Means ± standard error (n = 3) are shown, and different letters refer to significant difference at P < 0.05.