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| Titel |
Effects of raising frogs and putting pest-killing lamps in paddy fields on the prevention of rice pests and diseases |
| VerfasserIn |
Qing Teng, Xue-Feng Hu, Fan Luo, Ming-Yang Cao |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250099088
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| Publikation (Nr.) |
 EGU/EGU2014-14834.pdf |
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| Zusammenfassung |
| Frogs in paddy fields become less and less due to applying large amounts of pesticides and
human hunting for a long time, which causes the aggravation of rice pests and diseases. A
field experiment was carried out in the suburb of Shanghai to study the effects of artificially
raising frogs and putting frequency oscillation pest-killing lamps in paddy fields
on the prevention of rice pests and diseases. The field experiment includes three
treatments. Treatment I: 150 frogs, each 20 g in weight, per 100 m2 were put in
the fields; Treatment II: a frequency oscillation pest-killing lamp was put in the
fields; Treatment III: no frogs and pest-killing lamps were put in the fields. All the
experimental fields were operated based on the organic faming system. The amount of
organic manure, 7500 kg/hm2, was applied to the fields as base fertilizer before
sowing in early June, 2013. No any chemical fertilizers and pesticides were used
during the entire period of rice growth. Each treatment is in triplicate and each plot
is 67 m2 in area. The results are as follows: (1) During the entire growth period,
the incidences of rice pests and diseases with Treatment I and II are significantly
lower than those with CK (Treatment III). The incidence of chilo suppressalis with
Treatment I, II and III is 0, 0.46% and 1.69%, respectively; that of cnaphalocrocis
medinalis is 7.67%, 6.62% and 10.10%, respectively; that of rice sheath blight is
0, 11.11% and 5.43%, respectively; that of rice planthopper is 4.25 per hill, 5.75
per hill and 11 per hill, respectively. (2) The grain yield of the three treatments is
significantly different. That of Treatment I, II and III is 5157.73 kg/hm2, 4761.60 kg/hm2
and 3645.14kg/hm2 on average, respectively. (3) Affected by frog activities, the
contents of NH4-N, available P and available K in the soil with Treatment I are
significantly raised. All the above suggest that artificially raising frogs in paddy fields
could effectively prevent rice pests and diseases, especially reduce the incidences of
rice sheath blight and chilo suppressalis, and setting pest-killing lamps could also
effectively control rice pests, but not rice sheath blight, which contribute to the
increase of grain yield largely. Moreover, the activity of frogs in paddy fields could
improve soil fertility and increase bio-diversity. Acknowledgements: This work was
supported by the National Natural Science Foundation of China (No. 41130526). |
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