Effects of Arbuscular Mycorrhizal Fungi on Nutrient Exchange in Mulberry Plant in Rocky Desertification Areas

doi:10.3969/j.issn.1000-2561.2020.01.002

Abstract

Abstract:

To determine the effect of arbuscular mycorrhizal fungi (AMF) on the nutrient exchange in the plant soil system in rocky desertification areas, the effects of inoculation of arbuscular mycorrhizal fungi on the nutrient content, stoichiometry of plant and soil were studied by simulating seasonal drought in rocky desertification areas. Two periods of normal water supply and natural drought were set up for Fm and Ri treatment. Mulberry was harvested after growth for 90 d, and the content of C, N, P and K in the plant and soil was measured. AMF could effectively enhance the growth of mulberry seedlings in the two periods. After the occurrence of drought stress, the growth promoting effect of Ri and its adaptability to mulberry was better than that of Fm. Drought stress reduced the content of C, N, P and K in mulberry seedlings. The mineral nutrition in the seedling was improved by AMF, especially for N and P. The C content in the root and stem of the seedling was significantly reduced. Under normal water supply conditions, the soil C content after Fm and Ri application decreased by 7.00% and 8.55% respectively. Under drought stress, the content of available N, P and K in the soil significantly increased after Fm and Ri application, but under normal water supply, the content of available N, P and K in soil decreased. AMF also inreased C/P and N/P ratio under drought stress. In summary, AMF could affect the absorption and distribution of C, N and P nutrient of mulberry tree and the coordination of plant soil system in C, N and P according to the changes of water supply and demand of nutrient resources.

Key words: arbuscular mycorrhizal fungi, rocky desertification, drought stress, stoichiometric number

CLC Number:

S154.3

WANG Yan,XING Dan,SONG Lala,HAN Shiyu,CHEN Tingsu. Effects of Arbuscular Mycorrhizal Fungi on Nutrient Exchange in Mulberry Plant in Rocky Desertification Areas[J]. Chinese Journal of Tropical Crops, 2020, 41(1): 7-14.

Figures/Tables 6

References 40

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时期 Period	接种 Inoculation	株高 Plant height /cm	茎粗 Stem diameter /mm	叶面积 Leaf area /cm²	叶片数 Fresh leaf number	干重Dry weight/g			侵染率 Infestation rate/%
时期 Period	接种 Inoculation	株高 Plant height /cm	茎粗 Stem diameter /mm	叶面积 Leaf area /cm²	叶片数 Fresh leaf number	叶Leaf	茎Stalk	根Root	侵染率 Infestation rate/%
供水时期	-M	17.63^c	2.33^b	50.52^c	9.33^c	1.42^b	0.64^b	0.18^b	0.00
	Fm	20.83^b	2.60^b	63.79^b	10.67^b	1.61^a	0.89^a	0.25^a	60.54^b
	Ri	24.60^a	3.23^a	82.58^a	13.33^a	1.37^b	0.88^a	0.25^a	79.66^a
干旱时期	-M	19.50^B	2.59^B	53.97^C	6.00^B	0.87^B	1.04^C	0.39^C	0.00
	Fm	25.90^A	2.61^B	66.77^B	8.67^A	0.80^C	1.16^B	0.48^B	64.02^B
	Ri	26.55^A	3.24^A	86.76^A	9.33^A	1.26^A	1.49^A	0.58^A	68.27^A

时期 Period	接种 Inoculation	株高 Plant height /cm	茎粗 Stem diameter /mm	叶面积 Leaf area /cm²	叶片数 Fresh leaf number	干重Dry weight/g			侵染率 Infestation rate/%
时期 Period	接种 Inoculation	株高 Plant height /cm	茎粗 Stem diameter /mm	叶面积 Leaf area /cm²	叶片数 Fresh leaf number	叶Leaf	茎Stalk	根Root	侵染率 Infestation rate/%
供水时期	-M	17.63^c	2.33^b	50.52^c	9.33^c	1.42^b	0.64^b	0.18^b	0.00
	Fm	20.83^b	2.60^b	63.79^b	10.67^b	1.61^a	0.89^a	0.25^a	60.54^b
	Ri	24.60^a	3.23^a	82.58^a	13.33^a	1.37^b	0.88^a	0.25^a	79.66^a
干旱时期	-M	19.50^B	2.59^B	53.97^C	6.00^B	0.87^B	1.04^C	0.39^C	0.00
	Fm	25.90^A	2.61^B	66.77^B	8.67^A	0.80^C	1.16^B	0.48^B	64.02^B
	Ri	26.55^A	3.24^A	86.76^A	9.33^A	1.26^A	1.49^A	0.58^A	68.27^A

时期 Period	接种 Inoculation	碳C			氮N			磷P			钾K
时期 Period	接种 Inoculation	叶 Leaf	茎 Stalk	根 Root	叶 Leaf	茎 Stalk	根 Root	叶 Leaf	茎 Stalk	根 Root	叶 Leaf	茎 Stalk	根 Root
供水时期	-M	421.27^b	419.50^a	403.80^a	33.10^b	17.13^b	17.87^c	1.37^c	0.85^c	1.12^c	54.24^c	34.18^c	37.88^a
	Fm	422.10^b	417.37^b	396.93^b	45.83^a	22.57^a	25.17^b	4.00^b	2.91^b	2.63^a	56.53^b	39.00^a	32.23^c
	Ri	426.30^a	420.33^a	366.23^c	45.60^a	23.03^a	26.37^a	5.36^a	3.43^a	2.15^b	60.06^a	37.96^b	37.09^b
干旱时期	-M	412.27^A	418.00^A	416.53^A	37.27^B	20.30^C	19.10^C	1.77^C	1.07^C	1.04^B	58.27^A	26.37^C	24.68^C
	Fm	391.10^C	407.97^B	393.33^C	42.13^A	25.30^A	24.40^A	4.29^A	3.23^A	3.93^A	50.37^C	30.46^A	34.55^B
	Ri	402.63^B	404.10^C	400.97^B	35.30^C	22.37^B	21.53^B	2.90^B	2.22^B	0.96^B	50.99^B	26.45^B	50.43^A

时期 Period	接种 Inoculation	碳C			氮N			磷P			钾K
时期 Period	接种 Inoculation	叶 Leaf	茎 Stalk	根 Root	叶 Leaf	茎 Stalk	根 Root	叶 Leaf	茎 Stalk	根 Root	叶 Leaf	茎 Stalk	根 Root
供水时期	-M	421.27^b	419.50^a	403.80^a	33.10^b	17.13^b	17.87^c	1.37^c	0.85^c	1.12^c	54.24^c	34.18^c	37.88^a
	Fm	422.10^b	417.37^b	396.93^b	45.83^a	22.57^a	25.17^b	4.00^b	2.91^b	2.63^a	56.53^b	39.00^a	32.23^c
	Ri	426.30^a	420.33^a	366.23^c	45.60^a	23.03^a	26.37^a	5.36^a	3.43^a	2.15^b	60.06^a	37.96^b	37.09^b
干旱时期	-M	412.27^A	418.00^A	416.53^A	37.27^B	20.30^C	19.10^C	1.77^C	1.07^C	1.04^B	58.27^A	26.37^C	24.68^C
	Fm	391.10^C	407.97^B	393.33^C	42.13^A	25.30^A	24.40^A	4.29^A	3.23^A	3.93^A	50.37^C	30.46^A	34.55^B
	Ri	402.63^B	404.10^C	400.97^B	35.30^C	22.37^B	21.53^B	2.90^B	2.22^B	0.96^B	50.99^B	26.45^B	50.43^A

时期 Period	接种 AMF used	碳含量 SOC/(g∙kg^-1)	总氮量 TN/(g∙kg^-1)	总磷量 TP/(g∙kg^-1)	总钾量 TK/(g∙kg^-1)	有效氮量 AN/(mg∙kg^-1)	有效磷量 AP/(mg∙kg^-1)	有效钾量 AK/(mg∙kg^-1)
供水时期	-M	14.73^a	0.17^a	0.61^a	23.12^a	126.17^a	14.83^a	169.73^a
	Fm	13.70^b	0.17^a	0.44^b	19.74^b	117.83^ab	10.77^b	136.97^c
	Ri	13.47^b	0.16^b	0.29^c	19.95^ab	114.50^b	10.07^b	161.83^b
干旱时期	-M	15.63^A	0.14^C	0.59^A	19.93^B	106.77^C	7.83^C	109.37^C
	Fm	14.67^B	0.16^B	0.54^B	22.10^A	119.13^B	15.73^A	124.07^B
	Ri	15.53^A	0.18^A	0.60^B	21.17^AB	128.40^A	14.33^B	136.67^A