. Germination and early growth of coastal tree species on organic seed beds. Germination; Trees Growth. placed over each of the 60 filled holes to provide protection from rodents and birds (fig. 4). These hardware cloth cones alone provided the light shade treatment of 79 percent full §/ Porous Saran plastic shade-screen material placed over the hardware cloth provided the moderate and dense shade treatments of 43 percent and 2 percent full sunlight, respectively. Seed bed materials and shade treatments were randomly distributed, and each seed bed- shade combination was replicated fi
. Germination and early growth of coastal tree species on organic seed beds. Germination; Trees Growth. placed over each of the 60 filled holes to provide protection from rodents and birds (fig. 4). These hardware cloth cones alone provided the light shade treatment of 79 percent full §/ Porous Saran plastic shade-screen material placed over the hardware cloth provided the moderate and dense shade treatments of 43 percent and 2 percent full sunlight, respectively. Seed bed materials and shade treatments were randomly distributed, and each seed bed- shade combination was replicated five Figure 4.—Artificial seed beds in the field. Light, moderate, and heavy shade con- ditions were obtained with the hard- ware cloth and shade screen cones shown here. In November 1967, the seed beds were seeded with six species: Douglas- fir, Sitka spruce, lodgepole pine, western hemlock, western redcedar, and Pacific silver fir. With the aid of a plastic template, 10 seeds of each species were sown on each of the 60 subplots in the same random order. They were loosely covered with 1 centimeter of seed bed material immediately after sowing. The seed beds were not watered, but soil between the subplots was cultivated during the spring and summer of 1968 to prevent weed growth. Seed- lings were counted monthly to determine germination percentages. The survi- vors were harvested in October, when the following counts and measurements were made for each subplot: (1) Number of surviving seedlings, (2) height of tallest seedling of each species, (3) root length of tallest seedling of each species, and (4) ovendry shoot, root, and total weights of tallest seedling of each species. These data were then subjected to analyses of variance. Indivi- dual treatment averages were compared by Scheffe'te sts. Results Within-species differences in germination and survival on the four seed beds were small (tables 5 and 6), but initial germination was better on rotten — All shade int
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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectgermination
