Picea koraiensis人工林结实规律的研究

Picea koraiensin Nakai的♀球花(球果)多着生在树冠顶端数轮生枝上, 从稍部往下第3-5(8)轮枝上的♀球花(球果)能给予全树冠结实量的80％以上的信息, 第3-5(8)轮枝称信号枝。查数信号枝上的♀球花(球果)能预报全株产量。 半面树冠和全面树冠上的♀球花(球果)数量紧密相关, 得方程y=0.0275+1.8541 x, 测x值预报y(全树冠结实量)值。 同龄的Picea koraiensis人工林胸径越大, 结实株数％及单株结实量越多。预报林分的结实量以平均标准本法, 简便易行, 较准确。

THE REGULARITY OF THE YIELD OF SEED OF KOREAN SPRUCE IN THE PLANTED FOREST

Most of the female cones of Picea koftensis are bora in the headers. The female strobile oa the 3rd-5th (8th) verticillate branches generally could provide the information ftbout 80% of tbe seed yield of the whole tree. 3rd-5th(8th) verticillate branches were defined as the information branch The calculation of the female strobile could be predicted the seed yield of the whole tree. The number of the female strobile in the half of crown closely related 1 to that of all of crown so that the following equation was founded, y=0.0275 + 1.8541x. The measuring the value of x (the numders of female strobile in the half of crown) could predict the value of y (the yield of cone of the whole tree). In the planted forest of korean spruce of the same age, the greater of the D. B. H of the tree is, the more the percentage numbers of bearins cone of tree and the seed yield of the whole tree. The seed yield of forest was predicted by means of the method of areraSe standard tree, Thir method is more simple, convenient, feasible and accurate.