水土保持應用草類生育習性及種子繁殖試驗

Experiments on the Applied Grass Growing Habit and the Seed Breeding Test

顏正平(C. P. Yen) ； 林信輝(S. H. Lin) ； 周天穎(T. Y. Chou)

《中華水土保持學報》 14卷1&2期 (1983/12) Pp. 7-20

https://doi.org/10.29417/JCSWC.198312_14(1_2).0002

摘要

本試驗以適用之水土保持草類爲材料，觀察其生長習性及種子繁殖試驗，並以直接剪力試驗，探討草類根系固土能力。試驗結果摘錄如下：1.不同土壤間以黃棕壤的發芽率及生長性狀最佳，青灰岩最差，不同草類間以菅草發芽率最佳兩耳草最差。2根系生長之觀測中根系總伸長量最大爲羅滋草，最小爲蜈蚣草。垂直方向生長以盤古拉草之比例較大，水平方向生長以南非鴿草之比例最大，地毯草最小。3.草類根系固結土壤具有提高土壤抗剪強度之效能，以百慕達草之增加量最大。

並列摘要

This experiment investigated the growing habit and seed germination ability of seven suitable grasses for soil and water conservation. Direct shear force tests were also made to measure the shear strength magnitudes of grass roots. The results obtaind are as follows: (1) Among various soils, the Yellowish brown soil gives the best results of germination and. growth of grasses but the soil of Mudstone gives the worst. Of different species, Japans Silver grass has the highest germination rate, whereas Hilo grass has the worst. (2) As for root growth, the length of root extension is maximum for Rhodes grass, minimum for Ciliate centipede grass. Pangolu grass has a vertical root system, South African pigeon grass has a horizontal, and Carpet grass has a root system between those two types. (3) In terms of the magnitude of increasing the shear strength of soil, Bermida grass is the best among the grasses tested.