干旱胁迫对桢楠幼树渗透调节与活性氧代谢的影响及施氮的缓解效应

王曦,胡红玲,胡庭兴,张城浩,王鑫,刘丹

Effects of drought stress on the osmotic adjustment and active oxygen metabolism of Phoebe zhennan seedlings and its alleviation by nitrogen application

Xi WANG,Hong-Ling HU,Ting-Xing HU,Cheng-Hao ZHANG,Xin WANG,Dan LIU

表7 施氮结束后30天桢楠幼树抗氧化酶的活性(平均值±标准偏差)

Table 7 Antioxidant enzyme activity in Phoebe zhennan seedlings 30 days after the last nitrogen application (mean ± SD)

指标 Index	处理 Treatment		土壤含水量 Soil moisture content				平均值 Mean	F
指标 Index	处理 Treatment		80% FC	50% FC	30% FC	15% FC	平均值 Mean	F
SOD活性 SOD activity (U·g^-1·min^-1)	氮水平 N level	N0	1β251.53 ± 2.25^Ab	1β337.66 ± 24.89^Aa	1β041.02 ± 53.00^Cc	897.28 ± 42.24^Bd	1β131.87 ± 183.48^B	F(SW×SN) = 36.74^ F(SW) = 161.34^ F(SN) = 58.74^**
		MN	1β284.91 ± 1.15^Aa	1β306.73 ± 6.73^ABa	1β143.10 ± 33.87^Bb	1β136.76 ± 16.73^Ab	1β217.87 ± 83.47^C
		HN	1β258.43 ± 4.21^Ab	1β278.82 ± 18.54^Bb	1β336.30 ± 37.39^Aa	1β113.63 ± 17.59^Ac	1β246.80 ± 87.83^A
	平均值 Mean		1β264.96 ± 15.46^b	1β307.74 ± 30.03^a	1β173.47 ± 134.93^c	1β049.22 ± 116.96^d
POD活性 POD activity (U·g^-1·min^-1)	氮水平 N level	N0	2β153.65 ± 1.49^Bab	2β043.13 ± 27.43^Ab	2β200.82 ± 39.94^Ba	2β073.00 ± 61.27^Bb	2β117.65 ± 73.54^B	F(SW×SN) = 36.19^ F(SW) = 24.11^ F(SN) = 123.95^**
		MN	1β888.18 ± 39.09^Ca	1β960.08 ± 30.45^Aa	1β749.85 ± 141.03^Cb	1β673.58 ± 17.14^Cb	1β817.92 ± 133.86^C
		HN	2β347.99 ± 134.53^Ab	1β720.76 ± 73.13^Bc	2β545.87 ± 62.54^Aa	2β412.04 ± 48.07^Ab	2β256.67 ± 339.69^A
	平均值 Mean		2β129.94 ± 211.82^a	1β907.99 ± 150.89^c	2β165.51 ± 354.77^a	2β052.87 ± 322.59^b
CAT活性 CAT activity (U·g^-1·s^-1)	氮水平 N level	N0	2.90 ± 0.06^Ab	3.15 ± 0.05^Aa	3.10 ± 0.05^ABa	2.60 ± 0.04^Bc	2.93 ± 0.23^A	F(SW×SN) = 8.39^ F(SW) = 28.39^ F(SN) = 21.69^**
		MN	2.52 ± 0.15^Bc	2.74 ± 0.09^Cb	3.02 ± 0.02^Ba	2.75 ± 0.09^Bb	2.75 ± 0.20^B
		HN	2.74 ± 0.11^Ad	2.94 ± 0.10^Bcd	3.26 ± 0.09^Aa	3.04 ± 0.10^Abc	3.01 ± 0.21^A
	平均值 Mean		2.74 ± 0.21^c	2.94 ± 0.19^b	3.12 ± 0.12a	2.79 ± 0.21^c