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Volume 8, Issue 10 (Suppl)
J Earth Sci Clim Change, an open access
ISSN: 2157-7617
Climate Change 2017
October 19-21, 2017
CLIMATE CHANGE
October 19-21, 2017 | Rome, Italy
4
th
World Conference on
J Earth Sci Clim Change 2017, 8:10(Suppl)
DOI: 10.4172/2157-7617-C1-037
Effects of rainwater harvesting on sunflower growth and optimization of the ridge-furrow ratio with
different precipitation in the semi-arid region, Northern China
Pan Yuying
and
Pan Zhihua
China Agriculture University, China
T
he ridge-furrow rainwater-harvesting system (RFRHS) has been an important agricultural practice for improving
dependable production and adapting to the warming and drying climate in semi-arid regions.However, the optimum
RFRHS is not universal for different crop and precipitation conditions. To determine the optimal sunflower RFRHS under
different precipitation conditions in semi-arid regions in Northern China, a 3-year field experiment with 7 treatments was
conducted from 2013~2015 inWuchuan county. This study included 3 ridge-furrow ratio (Rrf) (1.0 m: 1.0 m (R1), 1.0 m: 0.5 m
(R2) and 0.5 m: 1.0 m (R0.5)) treatments with film-mulching ridge (M1) and no-mulching ridge (M0), and a flat plot without
mulching as the control treatment (CK). The results showed that the film-mulching treatments (M1R1, M1R2 and M1R0.5)
effectively promote sunflower growth, soil water storage (SWS) and the actual grain yield (Ya). They increased the available
precipitation and improved the SWS, hundred-grain weight and Ya by 0.4%~13.8%, 4.5%~70.2%, and 15.6%~107.5% compared
to the CK in 2013~2015, respectively. The results also showed that the optimal Rrf was reduced with increasing precipitation,
and there was no need to apply the sunflower RFRHS when the precipitation was more than 588.7mm. The optimum Rrf
interval for rainy, normal and dry years was 0.16~0.71, 0.71~1.34 and 1.34~2.77 respectively in Wuchuan County. Considering
the actual production condition and the precipitation conditions in Wuchuan, we suggest that M1R0.5 can be promoted in
this region. All in all, the study proved that the RFRHS could improve the crop production than the traditional cultivation,
especially in arid years, but did not consume more water. So the RFRHS would make positive contribution to sunflower
production in the semi-arid regions in Norther China under the warming and drying climate.
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