LIBRO-CONGRESO-CITRUS

were found that the order of drought resistance was as follow: ‘Sanhu Red’ tangerine > ‘Goutou’ orange
> ‘Carrizo’ citrange > ‘Choupi’ mandarin > ‘Trifoliate’ orange > ‘Citrumelo’ > ‘Chongyi’ mandarin > ‘Sanhu’
hybrid mandarin > ‘Sour’ pummelo. Furthermore, the ‘Sanhu Red’ tangerine is the local citrus variety of
Jiangxi province and it has stronger drought resistance among the nine citrus rootstocks, which could provide
a solid basis for exploiting rootstock resources of drought resistance. The result of the study could provide
theoretical foundation for germplasm improving and reference for reasonable development of germplasm
resource in citrus rootstocks.
S18P26
Performance of three sweet orange varieties grafted on different rootstocks
Yan S.T. 1 , Cheng C.Z. 2 , Ma Y.Y. 2 , Wang X. 2 and Zhong G.Y. 3
1Citrus Research Institute, Southwest University, China; 2Southwest University, College of Horticulture and Landscape Architecture,
China; and 3Fruit Tree Research Institute, Guangdong Academy of Agricultural Sciences, China. shutangyan@sina.com
The performance of three sweet orange (Citrus sinensis) varieties ‘Hamlin’, ‘Tongshui 72-1 Jincheng’ and
‘Troivita’, were studied on 11 rootstock varieties ‘Rangpur’ lime (Citrus limonia) (RL), ‘Volkamer’ lemon
(Citrus volkameriana) (VL), ‘Carrizo’ citrange (C. sinensis × Poncirus trifoliata) (CC), ‘Smooth Flat Seville’
(Citrus aurantium hybrid) (SFS), ‘Goutoucheng’ Sour Orange (C. aurantium) (GSO), ‘Sunchusha’ tangerine
(Citrus reticulata) (ST), ‘Rich 16-6’ trifoliate orange (P. trifoliata) (R16-6), ‘Rubidoux’ trifoliate (P. trifoliata)
(RT), ‘Pomeroy’ trifoliate (P. trifoliata) (PT), citrange (C. sinensis ‘Ruby’ × P. trifoliata) (C-35), and ‘Cleopatra’
mandarin (C. reticulata) (CM) in Chongqing, China during 2007-2009. Tree vigor, yield and quality were
investigated and compared for three consecutive years. The experiment was arranged in randomized
block design, three replications and five trees per plot. The scion cultivars ‘Hamlin’ orange, ‘Tongshui 72-1
Jincheng’, and ‘Trovita’ orange grafted on ‘R 16-6’ all showed excellent performance as did ‘Tongshui 72-1
Jincheng’ and ‘Trovita’ orange on ‘Rangpur’ Lime (RL), with strong or medium tree growth vigor, highest
yield, yield efficiency, and best fruit quality. ‘Hamlin’ orange and ‘Tongshui 72-1 Jincheng’ on ‘Pomeroy’
trifoliate (PT) and ‘Volkamer’ lemon (VL) also showed good productivity and fruit quality with a smaller
tree canopy, and could be planted more densely. ‘Rich 16-6’ trifoliate, PT, VL, and RL are the most suitable
rootstocks for ‘Hamlin’, ‘Tongshui 72-1 Jincheng’ and ‘Trovita’ orange. Additionally, PT and VL can be used
for high-density cultivation.
S18P27
Effects of six rootstocks on tree growth, fruit quality and N, P, K content of lemon
Hong L., and Xie Y.H.
Chongqing Academy of Agricultural Sciences (CAAS), Fruit Research Institute, China. cqxieyh@hotmail.com
The present experiment was carried out to screen proper rootstock for ‘Fino 47’ lemon. We had analysed
tree growth, fruit quality and annual dynamic changes of N, P, K content of leaves using ‘Fino 47’ lemon
grafted with six different rootstocks. Differences were found in both the vegetative and reproductive
growth of different treatments. The trees on ‘Carrizo’ citrange had the highest tree height and crown
diameter. Whilst, growth of new branches on ‘Carrizo’ citrange and ‘Swingle’ citrumelo became more
than other treatments. The trees on ‘Volkamer’ had largest number of terminal branches. In addition,
the flowering behavior of different treatments was not the same. Spring blossom of three-year-old trees
on ‘Swingle’ citrumelo was highest of all, however ‘Junos’ with highest autumn blossom. In the aspect of
fruit quality, the largest fruit weight was gotten from trees on ‘Swingle’ citrumelo. The largest content of
total acids and soluble solids were gotten from trees on ‘Volkamer’. The pericarp was thinner and oil cells
smaller using ‘Trifoliate’ and ‘Junos’ as rootstocks. Fruit on ‘Junos’ had highest juice content, while lowest
on ‘Red’ tangerine. The rootstocks did not influence the annual dynamic changes of N, P and K in leaves,
only influenced the contents of mineral nutrient in leaves at different stages. We came to the conclusion
primarily that ‘Volkamer’ and ‘Swingle’ citrumelo were suitable rootstocks for ‘Fino 47’ lemon, therefore
may be extended for demonstration and production.
XII INTERNATIONAL CITRUS CONGRESS 2012 - 337
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