紫穗狼尾草和狗牙根茎叶水文生态效应比较   总被引：2，自引：0，他引：2  

代会平  向佐湘  郭君  杜浩  曾凡湘 《草业科学》2009,26(2):107-113

研究了紫穗狼尾草Pennisetum alopecuroides地上部的生长状况、水文效应和生态效应。结果表明,紫穗狼尾草的成坪速度、成坪时间、草层高度和地上生物量均明显优于狗牙根Cynodon dactylon;其茎叶最大截留率45.35%,最大截留量5.12 mm,均高于狗牙根;其枯落物有效蓄水率304.88%,有效蓄水量0.19 mm,均低于狗牙根;其茎叶覆盖对降低地表温度和保持土壤水分更为明显、有效。  相似文献   

Napier grass strips and livestock: a bioeconomic analysis   总被引：2，自引：1，他引：1  

D. B. Magcale-Macandog  C. D. Predo  K. M. Menz  A. D. Predo 《Agroforestry Systems》1998,40(1):41-58

Napier grass strips are gaining some acceptance in Southeast Asia as a vegetative means of soil erosion control, due to the relative ease of establishment and management. In addition, the napier grass strips aid productivity of agroforestry systems by providing mulch or by being fed to livestock. In this paper, a bioeconomic comparison of different ways of utilising the napier grass cuttings is undertaken. The three uses examined for the cuttings were: as mulch in the alley areas, sold as fodder, and fed to animals with manure applied back to the system. The analysis linked the soils-oriented SCUAF model with economic and animal component models. SCUAF was parameterized using field data based on farmer interviews and field visits. Farmer interviews and field visits were conducted at Claveria, Misamis Oriental to gather additional data regarding costs and returns associated with animal production, and also to obtain the farm gate price of napier. Predicted biophysical results produced by the SCUAF model showed that application of napier grass cuttings, back into the system, directly as mulch or indirectly as animal manure resulted in higher maize and napier yields, lower soil erosion rates, and less of a reduction in soil mineral nitrogen and soil labile carbon levels. The comparison was made with the case where napier was sold off-farm as fodder. Cost-benefit analysis showed that higher economic returns were gained when napier grass cuttings were fed to animals, rather than applied directly as mulch. This economic benefit was attributed to the draught and transport services rendered by the animal and to a change in the value of the animals. This analysis highlights the value of utilizing animals within a napier grass strip system for control of erosion.This revised version was published online in November 2005 with corrections to the Cover Date.  相似文献   

Occurrence of Pennisetum polystachion ssp. setosum on the roadside verges and in some plantation crops of southern Thailand     

YUKA KOBAYASHI  MISAKO ITO  KLEOPAN SUWANARAK  WANLOP NOOPRADIT  CHARUCK BOONSRIRAT 《Weed Biology and Management》2003,3(1):57-60

  相似文献   

栽种对象草生产性能的作用     

袁福锦  周自玮  许艳芬  黄晓松  罗在仁 《草业科学》2008,25(2):73-76

对象草 Pennisetum purpureum 采用扦插、平埋2种植入方式和40、80、120 cm 3个行距水平进行组合栽种试验,结果表明,扦插和平埋的繁殖成活率分别为90%和87%,两者间的差异不显著(P<0.05).方差分析显示,行距水平间的草产量存在显著差异(F>F0.01),植入方式、植入方式与行距互作效应均不显著(F0.05).5次刈割的年合计产量表明,平埋 80 cm行距、平埋 40 cm行距的产量显著高于平埋 120 cm行距、扦插 120 cm行距的产量(P<0.05);平埋 80 cm行距与扦插 120 cm行距间的产量差异达到极显著水平(P<0.01).  相似文献   

巨菌草饲粮对七彩山鸡血液指标和脂肪相关基因的影响     

裘博文  郝柳柳  邓新为  罗娜  赵鹤青  赖宝怡  孙志宏 《畜牧与兽医》2021,(1):36-42

旨在探究日粮中添加巨菌草对七彩山鸡血液生理生化指标以及脂蛋白脂酶(LPL)基因和钙激活蛋白酶抑制蛋白(CAST)基因表达影响.在为期3周预试验后,选取1周龄(无外观上缺失,无精神、食欲不振等情况)健康的七彩山鸡(母)210只,随机分为1个对照组和4个处理组,每组3个重复,每个重复14只,5个组分别是在基础饲料中添加0％...  相似文献   

Production of polyhaploids of hexaploid wheat using stored pearl millet pollen   总被引：1，自引：0，他引：1  

M.N. Inagaki  A. Mujeeb-Kazi 《Euphytica》1998,100(1-3):253-259

The effects of drying and freezing on viability of pearl millet pollen were examined with the aim of using stored pollen in polyhaploid production of hexaploid wheat. Freshly collected pollen of pearl millet line NEC 7006 with 55% water content, germinated at a frequency of 80%. Pollen that was dried for two hours to 6% water content showed 50% germination frequency and maintained similar frequencies after the freezing process. In crosses of hexaploid wheat variety Norin 61 with fresh pearl millet pollen, embryos were obtained at a frequency of 27.6%. In crosses with pollen stored at -196 °C, -80 °C and -20 °C for one month, embryo formation frequencies ranged from 27.5 to 17.4%. After five and twelve months of storage, the frequencies ranged from 29.7 to 14.6% at storage temperatures of -196 °C and -80 °C, and from 8.0 to 3.2% at -20 °C, indicating significant differences among storage temperatures. However, no significant frequency difference was found among pollen water contents at the time of collection. All plants regenerated from crosses with pearl millet pollen stored for five months were wheat polyhaploids. These results suggest that stored pearl millet pollen is an efficient medium for producing polyhaploids in hexaploid wheat. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

Production of haploids in bread wheat, durum wheat and hexaploid triticale crossed with pearl millet     

M. N. Inagaki  C. T. Hash 《Plant Breeding》1998,117(5):485-487

Pearl millet is an efficient alternative to maize as a pollen source for haploid production in bread wheat. To compare haploid production frequencies in other Triticeae species, the crossabilities of two genotypes each of bread wheat, durum wheat and hexaploid triticale with four pearl millet genotypes and a maize control were examined. Embryos were obtained from crosses of all three species with both pearl millet and maize. However, significant differences in crossability were found among the three species (10.5–79.8% seed development and 1.4–15.8% embryo formation), as well as among genotypes of durum wheat (7.2–23.7% and 2.1–6.4%) and hexaploid triticale (0.3–20.6% and 0.1–2.7%). Crossability of bread wheat with pearl millet was relatively high. Haploid plants were regenerated from crosses of all three species with pearl millet. As in the case of maize crosses, low crossabilities of durum wheat and hexaploid triticale with pearl millet can be attributed to the absence of D-genome chromosomes.  相似文献   

能源草新品系桂能草1号特征特性及高产栽培技术研究     

覃维治  李韦柳  兰生葵  韦民政  郑虚  唐秀桦  熊军  闫海锋 《安徽农业科学》2014,(19):6188-6189,6192

能源草新品系桂能草1号是广西农业科学院经济作物研究所从国外引进的杂交狼尾草资源中经过多年选育出的能源专用型新品系.该品系和传统的牧草相比,生物产量和纤维素含量高;一年两收,一茬生育期约为150 d,适应性广,生长快,再生性强,抗逆性强;品比试验表明,其年干物质产量平均达到77.93 t/hm2,生物产量生产潜力巨大;经广西分析测试中心分析测定,干物率为36.3％,纤维素含量为57.0％,半纤维素含量为7.44％,热值高高达18.49 MJ/kg,灰分2.84％.桂能草1号新品系在南方大部分地区种植良好,由于既可以转化为乙醇,又可以制成固体燃料代替煤,所以有望成为我国南方优良的能源型纤维类草本作物.主要分析新品系桂能草1号的生物学特征,总结其高产栽培技术,为该品系发展生物质能源提供技术支持.  相似文献   

杂交狼尾草饲养肉兔试验   总被引：1，自引：0，他引：1  

张运昌  沈玉婷 《福建畜牧兽医》1995,(2):7-8

以象草为对照，测定杂交狼尾草饲养肉兔的肥育效果，结果表明，试验组平均日增重肉料比，采食量均比对照组优越，相差分别为＋２３．３％，－１３．０２％和＋１３．８１％。  相似文献   

宁夏中部干旱带沙质草地赖草和中亚白草的抗逆生理特性   总被引：4，自引：0，他引：4  

许冬梅  王堃  龙澍普 《中国草地学报》2007,29(2):31-34

对宁夏中部干旱带固定半固定沙地草地、丘间盐碱滩地草地、缓坡丘陵梁地草地三种类型沙质草地中赖草和中亚白草的几个抗逆生理指标进行了分析。结果表明；两种植物脯氨酸及可溶性糖含量均以丘间盐碱滩地草地最高；MDA含量以丘间盐碱滩地最低，SOD、POD及CAT活性以丘间盐碱滩地最高。赖草的脯氨酸含量、可溶性糖含量及MDA含量高于中亚白草，SOD、POD及CAT活性低于中亚白草，中亚白草较赖草抗逆性强。  相似文献