Fundamental Studies for Preventing the Japanese Cedar Pollinosis - On the Production and Dispersal of Cryptomeria Japonica and Chamaecyparis Obtusa Pollens in Our Country

在这一研究中，接下来的四个研究已经完成了两年。关于日本岛屿上加密森林中花卉设置的调查。（1） Flower setting in C.日本的标准符合当地的标准。在一般情况下，一种趋势被发现是由于雄性花朵的设置，以便在植物中变得更丰富，由种子制成，与植物中通过不同的切割进行比较。（2）C.的花朵设置日本根据变异和神经的不同而明显地被重新标记。日本海海岸起源于较晚的开始年龄的当地变体，与太平洋海岸起源的那些相比。C.关于Pollen生产的研究日本和Chamaecyparis Obtusa站。（1） Pollen生产在不同种类、树木年龄、生境、年份等方面的地位有所不同。C. Pollen生产的数量。日本的看台估计为250- 660公斤/公顷·中等年龄的看台，1，050公斤/公顷·旧看台在一年内。（2）中等年龄Ch. obtusa站估计为93- 620公斤/公顷·年的贫困率. 3。对C5不同动力学的研究。japonica and Ch. obtusa pollens.The time of pollen dispersal varied according to year and habitat。在关西地区，波伦分歧在2月上旬或中期于C5开始。japonica and during midmarch to early April in Ch. obtusa。波伦分裂的时期在奥图萨发生了60-80天。法伦·波伦谷物的数目每年各不相同，调查地点，立场状态，等等。对C.中男性花卉设置的抑制研究。日本化学品公司。这是不可能用生长调节器来设置一朵小花。Maleic hydrazide。NAA和B-999对杀死年轻的男性有影响。

In this study, the following four studies were performed during two years.1. Investigations on flower setting in Cryptomeria japonica forests in Japanese islands.(1) Flower setting in C. japonica stands according to locality. In general, a tendency was discovered for the setting of male flowers to be more abundant in plantations established by seedlings as compared with plantations established by cultivated cuttings.(2) The flower setting of C. japonica differed remarkably according to varieties and strains. Local varieties of the Japan Sea coast origin were later in the starting age of flower formation as compared with those of the Pacific coast origin.2. Studies on pollen production in C. japonica and Chamaecyparis Obtusa stands.(1) Pollen production in stands differed according to variety, tree age, habitat, year, etc. The amounts of pollen production in C. japonica stands were estimated to be 250-660kg/ha・yr in middle-aged stands, and 1,050kg/ha・yr in old stands in a year of abundance.(2) The amounts of pollen production in middle-aged Ch. obtusa stands were estimated to be 93-620kg/ha・yr in a year of abundance.3. Studies on the dispersal dynamics of C5. japonica and Ch. obtusa pollens.The time of pollen dispersal varied according to year and habitat. In the Kansai district, pollen dispersal started during early or mid February in C5. japonica and during mid March to early April in Ch. obtusa. The period of pollen dispersal was 60-80 day s in Ch. obtusa. The number of fallen pollen grains varied according to year, the place of investigation, the state of stands, etc.4. Studies on the inhibition of male flower setting in C. japonica by chemicals. It was able to inhibit male flower setting by spraying with growth regulators. Maleic hydrazide. NAA and B-999 were effective to kill young male flowers.