模拟薄壳山核桃自然散粉对浙江山核桃实生林分果实直感效应的研究

为探讨薄壳山核桃(C.illinoensis)自然散粉对浙江山核桃(C.cathayensis)实生林分果实的直感效应,采用模拟种间自然授粉试验,选取14年生浙江山核桃(C.cathayensis)实生林为研究对象,模拟自然条件抖落薄壳山核桃(C.illinoensis)花粉,测定不同方位和不同距离间隔的果实性状及品质,研究种间模拟天然授粉对浙江山核桃(C.cathayensis)果实的增效作用。结果表明在中心树东南西北4个方位,0~40 m范围内不同距离间隔采收的果实,果实性状的差异均达到了极显著的水平(P0.01)。处于下风口和近距离的浙江山核桃(C.cathayensis)果实性状比上风口和远距离果实受到的增效作用大,其中2棵0 m处的单株单果质量分别比CK重了43.23%和46.75%,核果质量分别重了43.59%和36.41%。所采样品的果实品质各指标值大部分都在山核桃(C.cathayensis)与薄壳山核桃(C.illinoensis)的对照之间。在模拟自然授粉条件下,薄壳山核桃(C.illinoensis)对浙江山核桃(C.cathayensis)群体授粉具有较高竞争性;薄壳山核桃(C.illinoensis)自然授粉对山核桃(C.cathayensis)果实有明显的增效作用。

A Study of the Fruit Xenia Effect of Pecan Pollination on Hickory Seeding Forest by Simulating Natural Pollination Condition

By means of simulating natural condition for pollination,fourteen-years-old C. cathayensis see-ding forest was taken as the research object to study the xenia effect of C. cathayensis' s fruit from C. illinoensis natural pollination.In order to study the synergies of simulating inter-specific naturel pollination on C. cathay-ensis's fruit,the C. illinoensis pollen was shaken off and the characters and qualities of fruits from different di-rections and different distances were measured. The results showed that there was significant difference ( P<0.01) in the fruit characters within 0-40m in different distances of four directions which centered on single C. cathayensis.The synergies to the fruits'characters showed that upwind and close effect was superior to the effect of windward and remote range.The fruit weight and nut weight of the two singles located at 0 mile were heavier than these of the CK by 43.23 %,46.75% and 43.59%,36.41%,respectively.The fruit quality indexes of the samples were mostly between those of C. cathayensis and C. illinoensis.C. illinoensis pollen had higher competi-tiveness than C. cathayensis under the condition of simulated natural pollination and C. illinoensis natural polli-nation made significant synergies on C. cathayensis's fruit.