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| Titel |
Effects of application of composted water-bamboo leaves on soil nutrients and vegetable quality |
| VerfasserIn |
Zhi-Qing Luo, Xue-Feng Hu, Xinzhe Lu, Fan Luo |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250142320
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| Publikation (Nr.) |
 EGU/EGU2017-5927.pdf |
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| Zusammenfassung |
| Liantang Town of Qingpu District in the western suburbs of Shanghai is known as a land of
water-bamboo, where the cultivation of water-bamboo attains more than 2000 ha
in area. A huge amount of water-bamboo leaves, approximately 1.5×108 kg, are
produced annually in the town and become a headachy agricultural waste. The leaves of
water-bamboo are difficult to be biodegraded, and will adversely affect the growth of
next crops if being directly returned to the fields due to its high C/N ratio. We
transformed these water-bamboo leaves into organic manure through fermenting and
composting. Total N, total P and total K of this fermented manure are 23.7 g kg−1,
6.39 g kg−1 and 44.3 g kg−1, respectively. To study the fertilizer efficiency of this
organic manure, four field experiments on vegetables were carried out in the suburb
of Shanghai. Each experiment designed the same four treatments of fertilization,
including a lower amount of the fermented manure (LM), 3750 kg ha−1; a higher
amount of the manure (HM), 7500 kg ha−1; synthetic chemical fertilizer (CF), 750 kg
ha−1; non-fertilized CK. Each treatment has three replicate plots, and each plot was
9 m2 in area. The results indicated that the application of the fermented manure
increased the contents of organic matter and nutrients in the soils significantly.
Compared with CK, the content of organic matter in the soils treated with HM
increased by 16.0%, and those of alkali-hydrolyzable N, available P, available K,
total N, total P and total K in the soils increased by 14.5%, 4.8%, 12.8%, 16.7%,
48.0% and 9.1%, respectively. Compared with CF and CK, the application of the
fermented manure, both LM and HM, increased the numbers of bacteria, fungi and
actinomycetes and improved the activities of urease and phosphatase in the soils
significantly. The study also indicated that the contents of soluble sugar and Vitamin C
in green peppers and tomatoes treated with HM increased by 62.8% and 14.8%,
respectively, compared with CK; while those with CF only by 18.4% and 4.9%,
respectively. Likewise, the contents of Vitamin C and soluble proteins in cabbage
treated with HM increased by 115.3% and 31.4%, respectively. Compared with
synthetic chemical fertilizers, the fermented manure released nutrients slowly and
persistently, which was conducive to maintain soil fertility for a long term and reduce
agricultural diffuse pollution effectively. Moreover, the application of this fermented
manure increased the contents of soluble sugar and Vitamin C in vegetables and
improved their quality significantly. Turning discarded water-bamboo leaves into
organic manure through fermenting and composting is not only low in cost, but also
contributes to the development of recycling agriculture in the suburbs of Shanghai. |
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