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一、在一般场圃条件下,杉木的场圃发芽率与实验室发芽率之间的关系,得出初步结论如下:1.杉木的场圃发芽率皆低于实验室发芽率,一般也低于发芽势,其场圃发芽率与实验室发芽率之比值是稳定在0.68—0.79范围以内,比值的平均常数为0.74(74%),其场圃发芽率与發芽势之比值在0.72—0.92之间,这个变动范围较场圃发芽率与实验室发芽率之比值来得大.因此在计算场圃发芽率指数时以实验室发芽率为基础要比发芽势来得准确.2.杉木场圃发芽率指数为0.74(即场圃发芽率与实验室发芽率之间的比值常数),在一般条件下,可以根据这个指数,直接从实验室发芽率计算出场圃发芽率,其算式如下场圃发芽率%=实验室发芽率×0.743.杉木的场圃发芽率与实验室发芽率存在直线相关,其场圃发芽率可按下式求得:y=bx-ay=场圃发芽率 x=实验室发芽率 a=0.2 b=0.74二、一般条件下,马尾松的场圃发芽率与实验室发芽率的关系,得出初步结化如下:1.马尾松的场圃发芽率接近于或稍低于实验室发芽率(因播种时间不同而异),二者比值是0.8—1.0,平均常数为0.9。2.马尾松的场圃发芽率接近于或稍高于发芽势(与播种时间有关),二者之比值在0.9—1.24之间。3.马尾松的场圃发芽率指数为0.9,一般条件下可以根据这个指数来计算场圃发芽率:场圃发芽率%=实验室发芽率×0.94.马尾松的场圃发芽率与实验室发芽率存在直线相关,可按下列方程式求得场圃发芽率y=a+bxy=场圃发芽率 x=实验室发芽率 a=9.2 b=0.78三、杉木和马尾松的场圃发芽率高低与场圃的土壤质地、复土种类、复土深度、播种时间、播种密度、播种方法及种子本身重量等因素有关。根据本试验结果,可初步看出:杉木在下列条件下,具有较高的场圃发芽率:①沙质壤土的圃地;⑦用林下土或黄心土复盖;③复土深度为0.5厘米;④在11—12月间播种;⑤条播法播种。马尾松在下列条件下具有较高的场圃发芽率:①沙土或沙壤的圃地;②用河沙复盖;⑤复土深度1.0厘米;④适当的播种密度(每平方米在2625粒以内);⑤使用大粒种子。兹将杉木和马尾松的实验室发芽率与相应的场圃发芽率列表如下:(?)
First, the general field nursery conditions, fir field nursery germination rate and laboratory germination rate of the relationship between the conclusions reached are as follows: 1. Chinese fir nursery germination rates are lower than the laboratory germination rate, generally low In the germination potential, the ratio of germination rate to germination rate in the field was stable within the range of 0.68-0.79, with an average ratio of 0.74 (74%). The ratio of germination rate to germination potential was 0.72-0.92 , The scope of this change is more than the ratio of field germination rate and laboratory germination rate is too large.Therefore in the calculation of field germination rate index laboratory germination rate is more accurate than the germination potential more accurate.2.Floral nursery germination The rate index is 0.74 (ie, the ratio between field germination rate and laboratory germination rate). Under normal conditions, germination rate can be calculated directly from laboratory germination rate according to this index. The formula is as follows Rate% = laboratory germination rate × 0.743. There is a linear correlation between the germination rate of the field and the germination rate of the laboratory. The germination rate of the field can be obtained as follows: y = bx-ay = germination rate of the field nursery x = experiment Room germination rate a = 0.2 b = 0.74 Second, the general conditions, Masson pine field nursery Bud rate and the germination rate of the laboratory concluded that the initial knot is as follows: 1. Masson’s germination rate close to or slightly lower than the laboratory germination rate (due to sowing time varies), the ratio between the two is 0.8 -1.0, and the average constant was 0.9.2. The germination rate of Masson pine was close to or slightly higher than the germination potential (related to sowing time), with the ratio between 0.9-1.24. 3. Masson’s germination rate of 0.9 index, under normal conditions can be calculated according to this index field nursery germination rate: field germination rate% = laboratory germination rate × 0.94 field masson pine germination rate and laboratory Germination rate there is a linear correlation can be obtained according to the following formula field nursery germination rate y = a + bxy = field germination rate x = laboratory germination rate a = 9.2 b = 0.78 Third, the cedar and Pinus massoniana germination rate It is related to the soil texture of the nursery garden, the type of the compound soil, the depth of the compound soil, the sowing time, the sowing density, the sowing method and the weight of the seed itself. According to the test results, it can be initially seen that Chinese fir has higher field germination rate under the following conditions: ① nursery area of sandy loam soil; ⑦ covered with understory soil or yellow heart soil; ③ depth of reconstituted soil is 0.5 cm ; ④ sowing in 11-12 months; ⑤ sowing sowing. Pinus massoniana has a higher germination rate under the following conditions: (1) sand or sand soil nursery; (2) with river sand cover; ⑤ depth of 1.0 cm; (4) appropriate planting density (2625 grains per square meter Within); ⑤ use large seeds. The following is a list of the laboratory germination rates and corresponding field germination rates for Chinese fir and Masson pine as follows: (?)