Regrowth Behaviour of Bahiagrass and Effect of Heavy Dressing of Macronutrients

DOI Web Site

Bibliographic Information

Other Title
  • バビアグラスの再生長過程と三要素増施の影響 : 生育,収量および無機成分の吸収経過について
  • バヒアグラスの再生長過程と三要素増施の影響 生育,収量および無機成分の吸収経過について
  • バヒアグラス ノ サイセイチョウ カテイ ト サン ヨウソ ゾウシ ノ エイキョウ セイイク , シュウリョウ オヨビ ムキ セイブン ノ キュウシュウ ケイカ ニ ツイテ

Search this article

Description

Experiment has been carried out for two years to find the effects of heavy dressing of macronutrients (N, P_2O_5 and K_2O) on the regrowth of Pensacola Bahiagrass in clayey mineral soil. In this experiment regrowth behaviour and change of inorganic constituent were traced on every one week. The results are as follows ; 1. Regrowth were different each other in the seeding year and the second year. In the seeding year regrowth was divided into two stages ; in the beginning elongation of plant height was vigorous and in following stage creeping stem spread over the ground. Regrowth in the second year was promoted both elongation of plant height and increase of fresh weight together, because of the creeping stems completely covered the ground. 2. The regrowth of Bahiagrass was considerably affected by temperature. Increase of plant height and weight of new top were retarded below 20℃. The depression of growth by aridity was slight. Therefore, Bahiagrass grew relatively well on drier clayey mineral soil, in droughty summer season. 3. Contents of inorganic nutrients (N, P_2O_5 and K_2O) in new tops were high in the beginning of regrowth and decreased gradually. On the contrary content of calcium increased with advanced stage of growth. Phosphoric acid content in seeding year was higher than that in second year. The absorbing process of inorganic nutrient were follows ; in the early stage of the regrowth phsphoric acid was absorbed well and in following stage nitrogen and potassium were more absorbed. In the last stage, calcium was markedly absorbed and uptake of potassium and phosphoric acid were considerably reduced. 4. When fertilizer was multiplied, heavy dressing of nitrogen affected growth and yield of Bahiagrass very much ; in seeding year significantly it brought increased number of tillers and thereby it greatly hastened the spread of surface runners. in the following year start of the regrowth being promoted. And total yield increased about 40% in the first year and 20% in the second year than standard application plot. Heavy application of phosphatic fertilizer scarcely affected on the growth and yield, but depression of growth was less than other plots in dry summer season. High dressing of potassium was of little or no benefit to the regrowth of Bahiagrass.

Journal

Details 詳細情報について

Report a problem

Back to top