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油桐种籽成熟过程中,种籽的含油量和水分含量是负相关。水分的亏缺,严重影响了油脂合成。从 8月 25日至 9月 15日含油量上升23.8％,而含水量下降24.55％,桐酸含量也上升,与此同时棕榈酸、硬脂酸、油酸、亚油酸以及亚麻酸的含量下降。桐酸在总脂肪酸含量中占79.42％。脂肪酸的累积、转化最活跃时期在8月份和9月上旬,这时期油桐栽培水分供应是至关重要的。 油桐不同种和品种(类型)脂肪酸组成有明显差异,以桐酸变化幅度最大,差值达16.06％。在这些样品中,桐酸含量超过76％的有15份,均为三年桐,其中少花单生果品种(类型)占12份,千年桐桐酸含量均不到70％。从油质来说,三年桐优于千年桐。在三年桐中少花单生果品种(类型)具有桐酸含量高,亚油酸、油酸含量较低的优点。
Tung seed maturation process, the seed oil content and moisture content is negatively correlated. Water deficit, severely affected the oil synthesis. From August 25 to September 15 oil content increased 23.8%, while the water content decreased 24.55%, the content of the acid also increased, while palmitic acid, stearic acid, oleic acid, linoleic acid and linolenic acid content decline. Eleostearic acid accounted for 79.42% of the total fatty acid content. The accumulation of fatty acids, the most active period of transformation in August and early September, during this period tung oil cultivation is crucial. Tung oil varieties and varieties (types) of fatty acid composition were significantly different, the largest changes in the degree of eleuthotungic acid, the difference of up to 16.06%. Among these samples, 15 were more than 76% of the total amount of eleostearic acid, and all of them were Trichosanthes. Among them, 12 species of low-fruiting single fruit species accounted for less than 70%. From the oil, three years Tong superior to the Millennium Tong. In the three years Tongsheng less flower single fruit varieties (types) with high content of eleosyl acid, linoleic acid, oleic acid content is low.