کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6375197 1624710 2013 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A note on suitable laboratory stover quality traits for multidimensional maize improvement
ترجمه فارسی عنوان
یک یادداشت در مورد ویژگی های کیفی مناسب آزمایشگاهی برای بهبود کیفیت ذرت چند بعدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
چکیده انگلیسی

A total of 10 maize stovers from two open pollinated varieties (OPV's), four hybrids (one grown in two different seasons, Kharif and summer) and at two different locations and two parental lines were tested for a range of laboratory fodder quality traits and for in vivo digestibility and voluntary feed intake in sheep. Laboratory stover fodder quality traits measured were nitrogen (N), neutral (NDF) and acid detergent (ADF) fiber, acid detergent lignin (ADL), in vitro organic matter digestibility (IVOMD) and metabolisable energy (ME) content. Highly significant (P < 0.0001) differences among the stovers were observed for all laboratory fodder quality traits and for dry matter digestibility (DMD), dry matter intake (DMI) and digestible dry matter intake (DDMI) with DMD (%) DMI (g/d) and DDMI (g/d) ranging from 53 to 65, 325 to 635 and 194 to 382, respectively. The total amount of stover refused (DMR) by the sheep did not differ significantly (P = 0.67) among the stovers, however when DMR was expressed relative to DMI significant differences (P = 0.0007) were observed. Laboratory fodder quality traits most closely correlated to the in vivo measurements were ADF with r = −0.83, r = −0.92 and r = −0.93 for DMD, DMI and DDMI, respectively, and ME with r = 0.77, r = 0.94 and r = 0.94 for DMD, DMI and DDMI, respectively. Applying statistical cross-validation procedures where the predicted values were not used for the development of the regression equations (“blind-predictions”), DMD, DMI and DDMI could be predicted by ADF with resulting R2 for good-of-fitness between observed and predicted values of 0.46, 0.76 and 0.79, respectively. Similarly DMD, DMI and DDMI could be predicted by ME with resulting R2 for good-of-fitness between observed and predicted values of 0.40, 0.83 and 0.83, respectively.

► Significant differences were found among the maize stovers for laboratory quality traits. ► Significant differences were also found among the maize stovers for DMD, DMI and DDMI. ► Laboratory quality traits closely correlated to the DMD, DMI and DDMI were ADF and ME. ► DMI and DDMI could be reasonably well predicted by ADF (r2 = 0.76-0.79) and ME (r2 = 0.83).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Field Crops Research - Volume 153, September 2013, Pages 58-62
نویسندگان
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