Rice allelopathy to barnyardgrass

Abstract

Abstract: 138 rice (Oryza sativa) germplasms were identified to study the allelopathy to barnyardgrass (Echinochloa crus galli),using the relay seeding technique .The results showed that Qingkun2 from Jiangxi Province, Xiayitiao from Jiangsu Province,Jizaoxian from Anhui Province, Ganzaoxian37 from Jiangxi Province, Shangnuo 1, IR68465-2-3-2 from IRRI,and Shuiyuan2 from Korea had a strongly excellent inhibition effect on barnyardgrass. Results from pot culture showed that Gumei 2 and Zhong156 had a greater inhibitory effect than control, and allelopathic material TN1 had no significantly inhibition effect,compared to non allelopathic material Xiushui 63. The effect of Zhong156 was related to its plant height, and significant different from that of Xiushui 63.Gumei 2 had a stronger inhibition effect on barnyardgrass,due to its own allelopathic trait.

Key words: Rice germplasm, Brnyardgrass, Allelopathy , denitrification, nitrogen cycle., elevated atmospheric CO₂, nitrification, microorganisms

CLC Number:

Q948.12

XU Zhenghao, YU Liuqing, ZHAO Ming. Rice allelopathy to barnyardgrass[J]. Chinese Journal of Applied Ecology, 2003, (5): 737-740.

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