Inoculation with Arbuscular Mycorrhizal Fungi: Effects on Wheat-straw Decomposition and Upland Rice Growth

doi:10.11924/j.issn.1000-6850.casb20191000739

Abstract

Abstract:

To explore the effects of arbuscular mycorrhizal (AM) fungi on wheat straw decomposition and crop growth, upland rice and wheat straw were used as materials, a pot experiment was conducted to analyze the effects of AM fungi inoculation on the decomposition rate and nitrogen (N) release rate of wheat straw, the soil enzyme activities, the chlorophyll content, root activity and biomass of upland rice. Results showed that the colonization percentage of AM fungi was 27.17%-28.53%. Compared with the treatment of straw returning without AM fungi inoculation, the decomposition rate and nitrogen release rate of wheat straw were significantly improved under the treatment of straw returning with AM fungi inoculation; and the soil enzyme activities of cellulase, protease and urease all increased significantly under the treatment of straw returning with AM fungi inoculation. Straw returning with AM fungi inoculation treatment increased the root activity on the 60th day, the total chlorophyll content of leaves on the 90th day, and promoted the accumulation of aboveground part and root biomass significantly. Under the condition of wheat straw returning to the field, AM fungi can effectively promote the decomposition of wheat straw and the secretion of soil enzyme, increase the root activity of upland rice, which is conducive to the biomass accumulation of upland rice in dry paddy fields.

Key words: arbuscular mycorrhizal fungi, wheat straw decomposition, soil enzyme activities, rice biomass, root activity

CLC Number:

S513

Jia Yanyan, Zhu Jun, Gu Dalu, Yang Wenfei, Du Xiaofeng, Sun Aixia, Qian Xinmin, Wen Tinggang, Zhu Yunlin. Inoculation with Arbuscular Mycorrhizal Fungi: Effects on Wheat-straw Decomposition and Upland Rice Growth[J]. Chinese Agricultural Science Bulletin, 2020, 36(30): 1-6.

Figures/Tables 3

References 33

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处理	菌根定殖率/%	麦秆分解率/%	麦秆氮素释放率/%	蛋白酶/IU	脲酶/IU	纤维素酶/IU	转化酶/IU
R	0	-	-	2.29c	1.69c	7.76bc	5.67d
RS	0	40.37b	34.17bc	3.16b	2.37b	9.53b	17.03ab
RF	28.53a	-	-	4.64a	2.85ab	8.37b	8.09c
RFS	27.17a	46.02a	39.33a	5.32a	3.13a	13.95a	18.41a
S	-	39.30b	28.05d	4.01ab	2.05b	10.09b	15.18b

处理	菌根定殖率/%	麦秆分解率/%	麦秆氮素释放率/%	蛋白酶/IU	脲酶/IU	纤维素酶/IU	转化酶/IU
R	0	-	-	2.29c	1.69c	7.76bc	5.67d
RS	0	40.37b	34.17bc	3.16b	2.37b	9.53b	17.03ab
RF	28.53a	-	-	4.64a	2.85ab	8.37b	8.09c
RFS	27.17a	46.02a	39.33a	5.32a	3.13a	13.95a	18.41a
S	-	39.30b	28.05d	4.01ab	2.05b	10.09b	15.18b

处理	叶绿素a/(mg/g)			叶绿素b/(mg/g)			总叶绿素/(mg/g)			根系活力/[μg/(g·h)]
处理	30 d	60 d	90 d	30 d	60 d	90 d	30	60 d	90 d	30 d	60 d	90 d
R	1.01a	1.39b	0.72b	0.61a	0.9b	0.39b	17.27a	22.88b	12.93c	151.58a	279.86a	98.11b
RS	0.95a	1.58ab	0.96ab	0.6a	0.94ab	0.49ab	16.56a	25.4ab	16.98b	115.65b	213.75b	92.32b
RF	1.13a	1.81a	1.07a	0.63a	1.01a	0.54a	18.81a	28.27a	18.76a	169.71a	301.42a	126.38a
RFS	1.05a	1.80a	0.99a	0.69a	0.95a	0.56a	18.53a	27.83a	17.93a	154.77a	272.15a	114.25ab

处理	叶绿素a/(mg/g)			叶绿素b/(mg/g)			总叶绿素/(mg/g)			根系活力/[μg/(g·h)]
处理	30 d	60 d	90 d	30 d	60 d	90 d	30	60 d	90 d	30 d	60 d	90 d
R	1.01a	1.39b	0.72b	0.61a	0.9b	0.39b	17.27a	22.88b	12.93c	151.58a	279.86a	98.11b
RS	0.95a	1.58ab	0.96ab	0.6a	0.94ab	0.49ab	16.56a	25.4ab	16.98b	115.65b	213.75b	92.32b
RF	1.13a	1.81a	1.07a	0.63a	1.01a	0.54a	18.81a	28.27a	18.76a	169.71a	301.42a	126.38a
RFS	1.05a	1.80a	0.99a	0.69a	0.95a	0.56a	18.53a	27.83a	17.93a	154.77a	272.15a	114.25ab

处理	地上部分干物质量/（g/株）	菌根效应/%	根系干物质量/（g/株）	菌根效应/%
R	89.59c	-	15.76b	-
RS	97.09b	-	15.17b	-
RF	103.42a	13.37a	16.78ab	6.01b
RFS	105.24a	7.74b	18.45a	17.76a