Effects of simulated nitrogen settlement and precipitation changes on physiological characteristics of Reaumuria soongorica and Salsola passerina

doi:10.7522/j.issn.1000-694X.2021.00003

Journal of Desert Research ›› 2021, Vol. 41 ›› Issue (3): 165-173.DOI: 10.7522/j.issn.1000-694X.2021.00003

Effects of simulated nitrogen settlement and precipitation changes on physiological characteristics of Reaumuria soongorica and Salsola passerina

Yanli Tian(), Peifang Chong(), Wentao Lu, Xiangyang Jia

College of Forest，Gansu Agriculture University，Lanzhou 730070，China

Received:2020-07-04 Revised:2021-01-07 Online:2021-05-26 Published:2021-05-26
Contact: Peifang Chong

Abstract

Abstract:

Nitrogen and water are two important environmental limiting factors for plant growth， especially in desert ecosystems that are limited by nutrients and water. The impact of nitrogen deposition and precipitation pattern changes on desert plants has been a research hotspot in recent years. In this experiment， the annual Reaumuria soongorica and Salsola passerina seedlings of the three growing methods of solitary R. soongorica， solitary S. passerina， and mixed R. soongorica-S. passerina were used as research materials. Pot experiments were used to study different nitrogen application levels （0， 4， 8 g·m^-2·a^-1） and different precipitation treatments （W-30%， W， W+30%） interaction on physiological characteristics of R. soongorica and S. passerina antioxidant enzymes and osmotic substance. The results showed that：（1） Nitrogen-water coupling significantly reduced the malondialdehyde content of R. soongorica and S. passerina in different growth modes.（2） The addition of nitrogen fertilizer under reduced precipitation and normal precipitation can significantly improve the antioxidant capacity of R. soongorica and S. passerina.（3） The soluble protein and proline content of the two plants were higher under the interaction of high nitrogen and reduced precipitation， indicating that increasing the application of nitrogen fertilizer can increase the osmotic adjustment substance of the plant under drought and improve its ability to resist drought.（4） The MDA content of mixed R. soongorica is significantly higher than that of R. soongorica， but S. passerina is the opposite. Increased application of nitrogen fertilizer and increased precipitation can reduce the increase of MDA under mixed R. soongorica and increase the decrease of MDA of mixed S. passerina. （5） Mixed growth significantly increased the CAT activity of the two plants， while the POD and SOD activities decreased. Mixed R. soongorica enhances its osmotic adjustment ability by increasing the content of soluble protein， and mixed S. passerina by increasing the content of proline. And under water and nitrogen treatment， it can better maintain the antioxidant and osmotic adjustment ability of mixed R. soongorica-S. passerina.

Key words: Reaumuria soongorica, Salsola passerina, nitrogen settlement, precipitation, growth modes

CLC Number:

Q948.11

Yanli Tian, Peifang Chong, Wentao Lu, Xiangyang Jia. Effects of simulated nitrogen settlement and precipitation changes on physiological characteristics of Reaumuria soongorica and Salsola passerina[J]. Journal of Desert Research, 2021, 41(3): 165-173.

Figures/Tables 5

References 37

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处理时间	每月平均降水量 /mm	每次灌水量/mL
处理时间	每月平均降水量 /mm	W-(降水减少30%)	W (对照)	W+(降水增加30%)
5月	11.2	13.05	18.64	24.23
6月	15.0	17.47	24.96	32.45
7月	23.0	26.80	38.28	49.76
8月	28.1	32.73	46.76	60.79
9月	18.2	21.20	30.29	39.38

处理时间	每月平均降水量 /mm	每次灌水量/mL
处理时间	每月平均降水量 /mm	W-(降水减少30%)	W (对照)	W+(降水增加30%)
5月	11.2	13.05	18.64	24.23
6月	15.0	17.47	24.96	32.45
7月	23.0	26.80	38.28	49.76
8月	28.1	32.73	46.76	60.79
9月	18.2	21.20	30.29	39.38

植物种	因素	丙二醛MDA	过氧化氢酶CAT	过氧化物酶POD	超氧化物歧化酶SOD
红砂	氮	113.877^**	2 977.441^**	627.185^**	59 320.919^**
	水	310.148^**	8 779.43^**	1067.717^**	16 734.038^**
	生长方式	458.608^**	1519.006^**	1 651.706^**	25 127.108^**
	氮×水	2.556	387.83^**	13.831^**	499.51^2**
	氮×生长方式	35.004^**	201.458^**	40.865^**	1 892.336^**
	水×生长方式	0.239	91.21^**	21.243^**	819.311^**
	氮×水×生长方式	1.206	40.52^**	24.863^**	218.649^**
珍珠猪毛菜	氮	199.311^**	5 089.873^**	1 314.613^**	70 938.048^**
	水	165.466^**	6 739.326^**	4 576.053^**	15 140.846^**
	生长方式	3 330.418^**	14 659.648^**	1 039.276^**	9 521.426^**
	氮×水	3.117^*	157.069^**	4.986^**	1 929.279^**
	氮×生长方式	3.856^*	1 230.202^**	11.71^**	1 200.972^**
	水×生长方式	0.405	428.483^**	88.045^**	173.447^**
	氮×水×生长方式	3.308^*	166.856^**	12.914^**	495.889^**

植物种	因素	丙二醛MDA	过氧化氢酶CAT	过氧化物酶POD	超氧化物歧化酶SOD
红砂	氮	113.877^**	2 977.441^**	627.185^**	59 320.919^**
	水	310.148^**	8 779.43^**	1067.717^**	16 734.038^**
	生长方式	458.608^**	1519.006^**	1 651.706^**	25 127.108^**
	氮×水	2.556	387.83^**	13.831^**	499.51^2**
	氮×生长方式	35.004^**	201.458^**	40.865^**	1 892.336^**
	水×生长方式	0.239	91.21^**	21.243^**	819.311^**
	氮×水×生长方式	1.206	40.52^**	24.863^**	218.649^**
珍珠猪毛菜	氮	199.311^**	5 089.873^**	1 314.613^**	70 938.048^**
	水	165.466^**	6 739.326^**	4 576.053^**	15 140.846^**
	生长方式	3 330.418^**	14 659.648^**	1 039.276^**	9 521.426^**
	氮×水	3.117^*	157.069^**	4.986^**	1 929.279^**
	氮×生长方式	3.856^*	1 230.202^**	11.71^**	1 200.972^**
	水×生长方式	0.405	428.483^**	88.045^**	173.447^**
	氮×水×生长方式	3.308^*	166.856^**	12.914^**	495.889^**

植物种	因素	可溶性蛋白SP	脯氨酸Pro
红砂	氮	1479.236^**	777.134^**
	水	542.641^**	1315.021^**
	生长方式	110.267^**	1928.662^**
	氮×水	6.164^**	27.319^**
	氮×生长方式	1.068	59.441^**
	水×生长方式	5.308^*	120.339^**
	氮×水×生长方式	1.877	62.764^**
珍珠猪毛菜	氮	4145.49^**	1843.819^**
	水	1579.516^**	464.782^**
	生长方式	1614.298^**	10740.754^**
	氮×水	110.396^**	7.208^**
	氮×生长方式	50.814^**	1391.517^**
	水×生长方式	40.809^**	260.556^**
	氮×水×生长方式	18.191^**	6.376^**

Effects of simulated nitrogen settlement and precipitation changes on physiological characteristics of Reaumuria soongorica and Salsola passerina

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