南印度型培地茅對肥料及除草劑的生長反應

Abstract

培地茅是一種可以生產精油，並具有水土保持與生產生質能源等多項功用的作物，其中又以南印度型的品系較適合栽培利用，雖然培地茅被認為環境適應力很高，但對於培地茅最適合的栽培管理措施研究較為稀少，在本研究中對不同品系的南印度型培地茅進行施肥及除草劑管理試驗，結果顯示施用化學複合肥料可以增加培地茅地上部鮮重、株高等性狀，但磷肥用量超過每年每公頃五百公斤時可能會產生毒害；雜草管理的部分則顯示通常以分蘗行營養繁殖之南印度型培地茅，能耐受多數萌前使用之除草劑，萌後選擇性的生長調節劑型除草劑2,4-地及快克草對培地茅的影響較小，可能可以提供培地茅田區選擇性化學防除闊葉草及部分禾草類雜草之用，而若要移除培地茅，則以萌後施用之系統型非選擇性殺草劑嘉磷塞及依滅草有最好的效果。

Vetiver grass is an useful crop can produce essential oil, conversant water and soil or produce biomass energy. In which varieties of south India type are more suitable for cultivating for many uses. Although vetiver grass can survive in different extreme environmental, there are little research focus on its optimum rang for cultivated managements. In this study treat different varieties of south India type vetiver to three levels of fertilizer and different type of herbicides, investigating its responses. Finding the wet weight of vetiver’s shoot and plant’s height will increase under fertilized. But vetiver may poisoned when treat fertilizer of P2O5 more than 500kg per year per hector. To establish the field of South India type of vetiver, we usually use its tiller to vegetative propagate. And has little damage by pre-emerge herbicides which can be used to weed control. The growth regulator type’s herbicides, 2,4-D and quinclorac can post-emerge control broad-leaved and some grasses selected with small damage to vetiver. If we aim to raze vetiver hedge, which glyphosate and Imazapyr belong non selected, systemic, post-emerge herbicides have the most effectively.