Effects of manual sowing methods of Medicago sativa and Bromus inermis on the distribution and content of soil organic carbon and nitrogen

Abstract

Abstract: A multi-layer sampling method was used to study the distribution and content of soil organic carbon (SOC) and nitrogen under two-year old single and mixed sowings of Medicago sativa and Bromus inermis. The soil bulk density was greatest under the singly sown M. sativa and least under the singly seeded B. inermis. SOC content was highest under singly seeded M. sativa, followed by the interlaced mixed methods during the growth of pasture. There was a significant difference of the last two methods compared with the other methods (P＜0.01). The lowest soil total nitrogen content was in the singly seeded B. inermis treatment and there was no significant difference among the other treatments. In the entire 0-40 cm soil profile, the SOC contents in the singly seeded M. sativa (46.98 t/ha) and interlaced mixed pasture (44.77 t/ha) were significantly greater than in the other mixed pasture (38.75 t/ha) and in singly seeded B. inermis (36.37 t/ha) (P＜0.05).

CLC Number:

TAI Ji-cheng, YANG Heng-shan, FAN Fu, ZHANG Qing-guo, SONG Gui-yun, SU Ya-le. Effects of manual sowing methods of Medicago sativa and Bromus inermis on the distribution and content of soil organic carbon and nitrogen[J]. Acta Prataculturae Sinica, 2010, 19(6): 41-45.

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