几种砧木对哈姆林甜橙植株生长、产量及果实品质的影响

以7种不同砧木的8年生哈姆林甜橙为试材,对植株营养生长、产量和果实品质进行了比较。结果表明,不同砧木对哈姆林甜橙生长和产量有不同影响,其中以卡里佐枳橙为砧的植株树冠体积最大,以光皮酸橘、枸头橙和李齐16-6枳为砧的植株树冠体积较小,单位树冠体积产量以光皮酸橘为砧的植株最高,单株挂果数则以李齐16-6枳和卡里佐枳橙为砧的最多。不同砧木对果实品质有显著影响,其中以光皮酸橘为砧的果实体积和单果质量最大,以兰普来檬为砧的果汁含量最高,以李齐16-6枳和卡里佐枳橙为砧的果实可溶性固形物(TSS)含量最高,以李齐16-6枳为砧的果实可滴定酸含量亦最高,而李齐16-6枳和兰普来檬为砧的果实维生素C含量最高。从外观品质看,枸头橙为砧的果实油斑病发生程度最高。综合评价认为,以卡里佐枳橙、李齐16-6枳为砧的单株具产量高、果汁TSS含量高和风味浓郁等优点,是哈姆林甜橙较为理想的砧木。

Effects of Seven Rootstocks on Tree Growth, Yield and Fruit Quality of 'Hamlin' Sweet Orange in South China

Tree growth, yield and fruit quality of eight years old 'Hamlin' sweet orange (Citrus sinensis L. Osbeck) on 7 rootstocks were evaluated in south China. The results showed that the trees with the largest size presented on Carrizo Citrange C. sinensis (L.) Osbeck × Poncirus trifoliata (L.) Raf., CT], while the smallest plant crown were on Smooth Flat Seville C. sinensis (L.) Osbeck ×C. paradisi Macfayden, GS], Goutouchen Sour Orange C. aurantium (L.), GT] and Rich Trifoliate 16-6 (P. trifoliate, LC) . The trees on GS had the highest yield per crown size. The largest fruit in weight and size were gotten from trees on GS. However, fruit from the plants on CT and LC and rootstocks were the largest in number per tree, and fruit from trees on Rangpur Lime (C. limonia Osbeck, RL) had the largest juice content. The largest content of total acids in juice were gotten from the fruit on LC rootstock, the largest content of vitamin C from that on LC and RL rootstocks, and the largest of juice Brix content from that on LC and CT. The largest in T/A (Brix : acid ratio) fruits from trees on Sunchusha Tangerine (C. reticulata Sunchusa, SM), GT, GS and CT. Whilst, fruit from trees on GT had the largest degree of oleocellosis. Overall, rootstock affected fruit size and weight, juice content, Brix, total acids and Brix: acid ratio, results so for showed that CT and LC were the most promising rootstocks for Hamlin sweet orange in south China.