Effects of Different Fertilizer Levels on Weed Community and Crop Yield in Organic Soybean Field in Ili Prefecture(PDF)

¡¶´ó¶¹¿Æѧ¡·[ISSN:1000-9841/CN:23-1227/S]

Issue:

2015Äê03ÆÚ

Page:

449-457

Research Field:

Publishing date:

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Title:

Effects of Different Fertilizer Levels on Weed Community and Crop Yield in Organic Soybean Field in Ili Prefecture

Author(s):

JIAO Zi-wei ¹;  ZHANG Xiang-feng¹;  SHANG Tian-cui¹;  DONG Ming²; GUO Yan-bin²

1.College of Chemistry and Biological Sciences, Ili Normal University, Yining 835000, China;

?2.College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China

Keywords:

Manure;  Organic soybean;  Weed community;  Biodiversity;  Production

PACS:

-

DOI:

10.11861/j.issn.1000-9841.2015.03.0449

Abstract:

In this article, we analyzed weed species, density, community structure, diversity and crop yield of soybean farmland under different fertilizer levels in Ili prefecture, Xinjiang Uygur autonomous region.Total of 10 families and 16 species of weeds were observed in the growth stages of organic soybean field, and the dicotyledonous and annual weed was the main type. Endogen weed of total 16-kind weeds had 3 species, which was all for gramineous weeds and accounted for 19% in all weeds; Dicotyledonous weed had 13 species, and accounted for 81% in all weeds. Treatment N180 (pure N 180 kg?ha^-1), treatment N120 (pure N 120 kg?ha^-1), and treatment N60 (pure N 60 kg?ha^-1), compared to control N0 (pure N 0 kg?ha^-1), weed species were basically identical, the number of weeds were not significantly different and had no influence under the four treatments.The community structure of farmland weeds was basically identical, and the dominant species of organic soybean field in seedling and flowering stage were Amaranthus retroflexus L, Echinochloa crusgalli (L) Beauv- var-mitis (Pursh) Peterm and Chenopodium album L under the four different fertilizer treatments, but the dominance of weed species was high or low.The dominant weed species in mature period were basic consistent with the seedling and flowering stage between treatment N180 and treatment N120, the dominant weed species of treatment N60 were Amaranthus retroflexus L, Echinochloa crusgalli (L) Beauv var -mitis (Pursh) Peterm and Echinochloa crusgalli (L) Beauv, but the dominant weed species of treatment control N0 changed to Amaranthus retroflexus L, Chenopodium album L and Echinochloa crusgalli (L) Beauv.The change trend of abundance, Shannon-Wienner index, Pielou evenness index and Simpson index of different fertilizer treatment was basically consistent.The weed community richness of organic soybean field of the different fertilizer treatment decreased with sampling frequency, but the species diversity and evenness of weed community had no influence, and the randomness enbodied by common kind and similarity of weed community was stronger. Based on the analysis of the factors about cost, increasing production effect and so on, although the soybean yield of treatment N180 was the highest, the economic cost was the highest; the cost of treatment N120 was relatively lower, and the effect of increase production was better.

References:

£Û1£Ý¶ÅÏà¸ï,¶­Ãñ.ÓлúÅ©Òµµ¼ÂÛ£ÛM£Ý.±±¾©:ÖйúÅ©Òµ´óѧ³ö°æÉç,2005£¨Du X G, Dong M. Introduction to organic farming £ÛM£Ý.Beijing: China Agricultural University Press, 2005£©

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