杉木壮苗定向培育技术研究

影响杉木壮苗培育的因素很多,在具备良种、圃地、施肥等基本条件下,其时空影响因素主要是播种时间、定苗时间和定苗株数。试验表明,上述三因素均对杉苗性状产生极显著影响,其中播种时间影响最大。其时空效应模式为12～1月播种(冬播),9月上旬最后定苗,每平方米定苗153株,杉木Ⅰ级苗产量最高,经济效益最好。而春播,特别是3月中旬播种效果最差。培育杉木Ⅰ级苗(Ⅰ级苗率大于30％,每公顷产苗60万株),通过定向培育措施可以实现。

A Study on the Oriented Cultivation Technique for the Strong Sesdling of Chinese Fir

The factors affecting the strong seedling of ohinese fir are many. when-the culture is provided with the main conditions of fine elite, nursery and fertilization etc.,the main affecting factors of time and space are sowing time,final seedling time and final seedling number. The experiment shows that the three factors all quite significantly affect the character of Chinese fir seedlings, with the sowing time being the most important. The time-space effect patterns are as follows: when sown in December to January ( winter sowing) , final seedli_ ng time is in the first ten days of September, final seedling number seventeen per square metre, the yield, of level I seedlings is the highest, the economic benefit the best. The effect of spring sowing, especially in the second ten days of March is the least. Through the oriented culture, it can be realized to cultivate the level Ⅰ seedling of Chinese fir ( the level Ⅰ seedling ratio must be more than 80%,and the number of seedling per mu more than forty thousand).