桑の稚苗生産と火山灰土用土および赤黄色土用土の水分張力との関係〔桑の稚苗生産に及ぼす土壌水分の影響-2-〕

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The experiments were carried out to clarify the relationship between growth of hard-wood cutting of mulberry tree (Ichinose) and moisture tension (from pF 0 to pF 4.1), using volcanic ash soils and red-yellow soils. In the case of volcanic ash soils, the higher percentage (80-100%) of sprouting and root initiation from cutting silps were obtained under soil moisture from pF 1.5-2.0 plot to pF 2.2-2.7 plot. The root fresh weight also exceeded 1 gram under the condition from pF 2.0-2.5 plot to pF 2.5-2.8 plot. In the care of red-yellow soils, the percentage of sprouting from cutting silps was more than 80% from pF 0-0.2 plot to pF 2.5-3.2 plot. But, root fresh weight exceeded about 1 gram under the condition from pF 1.6-1.7 plot to pF 3.4-3.7 plot. From the above mentioned results it may be concluded as follow: The optimum soil moisture tension for the production of young cuttage ranges from water folding capacity after 24hrs (FC 24) to moisture, of rupture of capillary.
日本蠶絲學會の論文