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龙爪茅与海滨雀稗抗寒性比较 被引量:3
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作者 柯黄婷 沈益新 《草原与草坪》 CAS 2009年第4期7-11,共5页
以海南野生海滨雀稗和海滨雀稗育成品种Salam作对照,对龙爪茅的抗寒性进行了评价。在实验室模拟秋冬季温度条件下,测定了龙爪茅及海滨雀稗的相对电导率(REC),氧化物歧化酶(SOD)活性和二醛(MDA)含量的变化,并在南京田间条件下观测了各材... 以海南野生海滨雀稗和海滨雀稗育成品种Salam作对照,对龙爪茅的抗寒性进行了评价。在实验室模拟秋冬季温度条件下,测定了龙爪茅及海滨雀稗的相对电导率(REC),氧化物歧化酶(SOD)活性和二醛(MDA)含量的变化,并在南京田间条件下观测了各材料越冬期间的枯黄率。结果显示,25~5℃温度处理,各材料基本不受伤害,REC,SOD活性和MDA含量变化不明显。5~0℃条件下,各材料REC基本不变,但SOD活性下降,MDA含量增加。0^-16℃条件下,各材料随温度的降低,REC迅速增加,SOD活性迅速降低,而MDA含量升高。通过拟合Logistic方程分析,龙爪茅,海南野生海滨雀稗和Salam的LT50分别为-4.2,8.0和-8.1℃。田间自然条件下各材料自10月26日开始逐渐表现出枯黄,其枯黄速度龙爪茅最快,海南野生海滨雀稗次之,Salam最慢。结果表明,龙爪茅耐寒性逊于海滨雀稗,其草坪利用需要进行耐寒性方面的驯化选育。 展开更多
关键词 龙爪茅 海滨雀稗 抗寒性 枯黄时间
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Proximate analysis: Relative feed values of various forage plants for ruminants investigated in a semi-arid region of Punjab, Pakistan
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作者 Kafeel Ahmed Muneeba Shaheen +6 位作者 Farhad Mirzaei Zafar Iqbal Khan Sumaira Gondal Asia Fardous Abrar Hussain Fahim Arshad Tahir Mehmood 《Agricultural Sciences》 2013年第6期302-308,共7页
The experimental site “Sial Morr Sugar mill, District Sargodha” Punjab, Pakistan was selected to carry out present investigation. The forage samples of Eragrostis pilosa, Dactyloctenium aegyptium, Parthenium hystero... The experimental site “Sial Morr Sugar mill, District Sargodha” Punjab, Pakistan was selected to carry out present investigation. The forage samples of Eragrostis pilosa, Dactyloctenium aegyptium, Parthenium hysterophorus and Calotropis procera were collected from the three sites held in this area. The forage samples were cleaned with distilled water to rinse dust particles and other impurities. These forage samples were air dried, oven dried and ground for the assessment of proximate analysis. Proximate analysis procedures including the percentage of moisture content, crude protein, ash contents and crude fiber in the sample were determined by the Association of Official Analytical Chemists methods. The CP contents among different plant species ranged from 8.1% to 26.2% at all sites. The lowest CP value was found in Eragrostis pilosa at site III while the highest CP contents in Dactyloctenium aegyptium at site II. The CP content showed significant (p < 0.05) result among all species at all sites. There was consistence pattern of increase and decrease found during all plant species at all sites. Generally, CP concentration averaged high at site II. Our CP contents are above the critical value. Considering the overall percentage of moisture composition, it was highest at site II. However, the moisture was found more in Calotropis procera at site II. The Dactyloctenium aegyptium had the least moisture content of 3.9% while the highest water content of 7%. Ash contents varied from 7.2% to 17.9% among various plant species at all sampling sites. The lowest ash contents were recorded in Dactyloctenium aegyptium at site III. At site II, ash contents were highest in Eragrostis pilosa. The differences between ash contents of various plant species were significant (p < 0.05) at all sampling site. Generally, the ash contents were higher at site II. Crude fiber contents differed significantly (p Parthenium hysterophorus had greater crude fiber contents at site II while the lowest value of CF found in Dactyloctenium aegyptium at site I. The differences were significant between all plant species other than the Specie I at all sites. The values ranged from 1.2% to 4.1%. It was highest in Parthenium hysterophorus (4.1%) at site I and least in Dactyloctenium aegyptium (1.2%) at site III. Maximum ether extract value was achieved at site I. 展开更多
关键词 ERAGROSTIS pilosa dactyloctenium aegyptium PARTHENIUM hysterophorus Calotropis procera NUTRITIONAL Values PROXIMATE Contents
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