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題名 | 尼羅草最上葉領高度與產量及品質的關係=Relationships between Toppest Leaf Collar Height and Forage Yield or Quality of Nilegrass |
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作者姓名(中文) | 蕭素碧; 許進德; | 書刊名 | 中華農學會報 |
卷期 | 8:3 2007.06[民96.06] |
頁次 | 頁210-224 |
分類號 | 434.4 |
關鍵詞 | 尼羅草; 最上葉領高度; 牧草產量; 牧草品質; Nilegrass; Acroceras macrum; Toppest leaf collar height; Forage yield; Forage quality; |
語文 | 中文(Chinese) |
中文摘要 | 以尼羅(Acroceras macrum)AC14、NLT(尼羅草臺畜一號)、AC26及AC30等四個不同基因質的品系為材料,於2002年之春、夏及秋等三季,每季從生長14天至91天每週調查農藝性狀包括最上葉領高度(TLCH)、株高(PH)、乾物率、葉/莖比(L/S)及乾物產量(DMW)等,並分析粗蛋白質(CP)、酸洗(ADF)及中洗(NDF)纖維及相對飼養值(RFV)等牧草品質,結果TLCH、PH、L/S、DMW、CP、ADF、NDF、及RVV等於不同季節、割期及品系間皆表現極顯著的差異,且受季節、割期及品系間交感的影響。DMW於品系間以AC30之6.0公噸/公頃/次最高,其次為MNLT1之5.6公噸/公頃/次,CP以AC26及AC30最高,分別為12.1及11.5%從此間差異不顯著,ADF及NDFN以NLT1最高,AC30皆居中,RFV以AC14之128最高,AC30之121居中,由上知AC30具高的DMW及CP,中等量的ADF、NDF及RFV,此結果顯示牧草選育可同時選到高產及高品質的品系。而DMW平均以夏季最高,CP及RFV以春季最高,ADF及NDF以春季最低,顯示春季乾草具較佳的品質。四個品系於三個季節將TLCH與產量或品質進行相關分析,結果除秋季AC14品系之TLCH與ADF、NDF及RFV等相關不顯著外,其餘TLCH皆與DMW、CP、ADF、NDF及RFV等 呈極顯著相關。進一步以TLCH為自變數進行直線迴歸分析,亦除秋季AC14之ADF、NDF及RFV等之迴歸係數不顯著外,其餘皆達極顯著水準,於春季TLCH對DMW、CP、ADF、及RFV等之迴歸決定係數(□)平均達0.77,剩餘機差(RMSE)為3.35,於夏季□平均達0.76,RMSE為2.94,而於秋季□為0.46,RMSE為3.47,顯然於秋季除TLCH外尚存有其他不明因素影響著產量及品質,由上可知於三個季節種植不同品系的尼羅草,可於田間直接測量TLCH,之後代入直線迴歸程式,可以簡單有效地預估DMW、CP、ADF、NDF及RFV等供收穫管理的參考。 |
英文摘要 | The plants of four nilegrass (Acroceras macrum) germplasms, i.e., AC14, NTL1 (CV. NIlegrass Taishi No.1), AC26 and AC30 were tested weekly to determine the relationships between toppest leaf collar height (TLCH) and forage yield and quality from the 14th day after cutting (DAC) to the 91th DAC in spring, summer and fall of 2002, respectively. The results showed that TLCH, plant height (PH), leaf/stem (LSR), dry matter weight (DMW), crude protein (CP), acid (ADF) and neutral (NDF detergent fibers and the relative feeding value (RFV) were significnalty different among the three growth season, cutting stages and lines. Line AC30 had the highest DMW with 6.0 mt/ha/cut, followed by NLT1 with 5.6 mt/ha/cut. AC30 had higher CP 11.5%, moderate ADF, NDF and RFV. It indicated that AC30 might produce higher forage yield with better quality. DMW was the highest in summer, yet the highest CP anf RFV and the lowest ADF and NDF were shown in spring. Our study showed that nilegrass could produce forage with better quality in spring. The correlation coefficients between TLCH and DMW, CP, ADF, NDF or RFV as dependent variable of four lines in three seasons were highly significant, respectively, except ADF, NDF and RFV of AC14 in fall. The averages of regression determination coefficients (□) of DMW, CP, ADF, NDF and RFV of four lines were 0.77, 0.76 and 0.46 and the root mean square errors (RMSE) of those were 3.35, 2.94 and 3.47 in three season, respectively. Obviously, other factors also affected the forage yield and quality in fall, From above-mentioned results, TLCH could provide useful information for harvest management of nilegrass by using linear regressions to predict DMW, CP, ADF, NDF and RFV in the field directly. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。