Ecological Studies on Establishment and Development of Zoysia japonica STEUD.-Dactylis glomerata L. Association from Cut-over Land of Broad-leaved Deciduous Forest : I. Establishment of Zoysia japonica STEUD., Dactylis glomerata L. and Several Weed Species Surface-sown on the Land

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  • 落葉広葉樹伐採跡地におけるシバ-オーチャードグラス型草地の成立過程に関する生態学的研究 : I.表面播種したシバ(Zoysia japonica STEUD.),オーチャードグラス(Dactylis glomerata L.)および数種草類の定着に及ぼすリターと施肥の影響
  • 落葉広葉樹伐採跡地におけるシバーオーチャードグラス型草地の成立過程に関する生態学的研究-1-表面播種したシバ(Zoysia japonica Steud.),オーチャードグラス(Dactylis glomerata L.)および数種草類の定着に及ぼすリターと施肥の影響
  • ラクヨウ コウヨウジュ バッサイ アトチ ニ オケル シバ オーチャードグラス

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Abstract

Dactylis glomerata is dominant species In the majority of improved pastures in cool-temperate zone of Japan. It is necessary to apply a large amount of soil amendment and chemical fertilizer to establish Dactylis glomerata. Zoysia japonica is dominant species in native pasture, and aggressively grows during summer even without fertilizer application. Zoysia pastures were widely distributed in the area from cool-temperate zone to warm-temperate zone in Japan. But utilization of the pasture is rapidly decreasing due to low productivity comparing with that of improved pasture. The purpose of the studies is to develope a method of establishing the association of Z. japonica and D. glomerata. The association will be promised a stable and low-input pasture for beef cattle in those mountainous areas. This report presented the effect of litter and fertilizer applicalion on the establishment of D. glomerata, Z. japonica and several weed species sunface-sown on the cut-over land in central Honshu of Japan. These weeds are typical species appearing on each stage of secondary succession in Japan. 1) D. glomerata seedlings were well established not only on the fertilized plots but also on non-fertilized plot. But the growth of seedlings established on litter covered seed-beds was higher than on litter removed seed-beds in all the fertilizer treatments plots. 2) Z. japonica seedlings were well established on the litter removed seed-bed in the non-fertilized plot. In order to keep a good population of both species, it is necessary to prepare the seed-bed without litter and without fertilizer application. 3) Setaria glauca appearing in the earliest stage of the secondary succesion was established well on non-fertilized plot. Therefore, the species is considered as plant for judging establishment of the Z. japonica-D. glomerata association.

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