Comparison on Agronomic Characteristics and Chemical Compositions among Different Hsiantsao Lines(Mesona procumbens Hemsi)

Abstract

比較農試所收集九品系仙草的農藝性狀，發現有四品系屬半直立型，五品系為匍匐型。農藝性狀與產量關係探討發現，葉綠具齒狀，葉形大且長者較高產。礦物元素含量分析，以鉀含量較高，次為鈣、磷及鎂，且此等元素均以葉含量比莖高，其中鐵含量較高者均為葉色較深綠之A、D及H品系。葉的粗蛋白質、粗脂肪及灰分之分析，仍然發現葉含量均比莖高，但粗纖維含量則較低。無氮抽出物分析結果，以A、B、C及I品系之莖葉間含量差異較微。碳水化合物組成中之游離糖及多醣體含量分析，大部份品系之莖含量均比葉高，但A及B品系之莖與葉含量較接近，因此仙草選種指標除重視葉率外，應一併考慮莖之無氮抽出物含量“單位栽培面積乾草、葉片產量調查與凝膠強度分析，於品系比較試驗結果，A品系兩年平均乾草產量達12,683 kg/ha，葉片產量3,328 kg/ha最高，次為C品系分別為9,822 kg/ha及3,203 kg/ha。凝膠強度A品系為86.69/cm,C品系為66.1g/cm較高。 桃改場所收集九品系中有二品系屬匍匐型，餘均為半直立型。單位栽培面積乾草、葉片產量調查與凝膠強度分析，發現TY3及TY4兩品系表現較佳。兩年平均乾草產量TY3品系達8,881 kg/ha，葉片產量3,096 kg/ha，而TY4品系分別為8,575 kg/ha及2,794 kg/ha。凝膠強度TY3品系平均為61g/cm，TY4品系為49.19/cm。 The agronomic characteristics of 9 different hsian-tsao lines coll-ected by TARI were compared, Results found that 4 lines are semi-erect type and the rest are runner type. Results from studiyng on relationship between agronomic characteristics and dry grass yield found that line with large leaf blade and teeth in margin has higher dry grass yield. Results from analyzing the content of mineral elements shown that highest rate in leaves and stem is potassium, following by Ca, P and Mg in order, also the contents in leaves were higher than those in stem. It also found that A, D and H lines with higher iron content had dark green leaves than those of other lines. Comparison in the chemical composition of 9 different hsian-tsao lines,it was found that the contents of crude protein crude fat and ash were higher in leaves for all lines, but crude fiber was less than in stem. The contents of nitrogen-free extracts in leaves were found little differences comparing with those in stem for A B -. C and I lines, The con-tent of carbohydrate was higher in stem than that in leaves. Among carbohy-drate compositions, the content of sugar and polysaccharide in leaves had little differences comparing with those in stem for A and B lines. Therefore, it can not consider the leave percentage as the only indicator, the content of nitrogen-free extracts in stem should be consider too for sele-oting in hsian-tsao. Results found that the dry grass and leaves yields for A and C lines were 12,683 and 9,922 kg/ha, and 3,328 and 3,203 kg/ha res-pectively, A and C lines in gel formation strength with 86.6 and 66.1 g/cm also had good performance than that of the other lines. Taoyuan District Agri-cultural Improvement Station conducted similar experiment in recent years and that 2 lines belongs to runner type while the rest are semierect type in total of 9 lines. It found that TY3 and TY4 lines had good performance in dry grass yield - leaves yield and gel formation strength than the other lines, TY3 and TY4 lines respectively obtained 8,881 and 8,575 kg/ha in dry grass yield. 3,096 and 2,794 kg/ha in leaves yield, 61 g/cm and 49.1 g/cm in gel formation strength