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

防治日本柳杉花粉病的基础研究——我国柳杉、日本扁柏花粉的产生和传播

基本信息

批准号：
01490015
负责人：
HASHIZUME Hayato
金额：
$ 2.11万
依托单位：
Tottori University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

项目摘要

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.

在这项研究中，在两年内进行了以下四项研究。日本海岛柳杉林落花调查：(1)柳杉立地落花。总体而言，苗木人工林的雄花落花率比人工插穗人工林高。(2)不同品种、不同品系的日本锦鸡儿雄花落花率差异显著。与太平洋海岸品种相比，日本海岸的地方品种在花朵形成的起始时期较晚。(1)不同品种、不同树龄、不同生境等林分的花粉产生量不同，中龄林的产粉量为250-660 kg/hm2·a，丰产年的老林产粉量为1,050 kg/hm2·a。在丰产年，钝顶草林分估计为93-620公斤/公顷·年。C5的扩散动力学研究。Jumonica和中国稻曲霉Ch.钝顶花粉。花粉散布时间因年份和生境而异。在关西地区，花粉传播始于2月初或中旬的C5。3月中旬至4月上旬在中国。钝顶牛。在中国，花粉传播期为60-80天S。钝顶牛。不同年份、不同调查地点、不同林分状况不同，落粉数也不同。化学药剂对海棠雄花结实的抑制作用研究。喷施生长调节剂可抑制雄花结实。顺丁烯二酸肼。NAA和B-999对幼龄雄花有较强的杀灭作用。