青藏高原东北部酸模属植物种子萌发特性的研究   总被引：3，自引：0，他引：3  

张文静 《青海草业》2004,13(1):2-5,9

研究了青藏高原东北部高寒地区蓼科酸模属(Rumex)5种植物种子特征，结果表明发芽温度范围、发芽适温、发芽所需的天数以及发芽率对种子萌发特性有不同的影响。  相似文献   

Ecology and non-chemical control of Rumex crispus and R. obtusifolius (Polygonaceae): a review   总被引：1，自引：1，他引：1  

J G Zaller 《Weed Research》2004,44(6):414-432

  相似文献   

Light, temperature and burial depth effects on Rumex obtusifolius seed germination and emergence   总被引：1，自引：0，他引：1  

S Benvenuti  M Macchia  & S Miele 《Weed Research》2001,41(2):177-186

Trials were carried out to investigate the effects of light and temperature on germination of Rumex obtusifolius L. After several months of storage, seeds gradually lost dormancy and became photosensitive. Thermal optima for germination were between 20 °C and 25 °C in light or in darkness. At lower temperatures there was a greater demand for light, so that the greatest differences in germination percentage (between low and high temperatures) were found within the 10–15 °C temperature range. The calculated thermal minima ( x -intercept method) in light and darkness were 8.3 °C and 6.1 °C respectively. Daily temperature fluctuation increased germination even after seed irradiation with far-red light, suggesting a lower demand for the far-red-absorbing form of phytochrome. Seed burial inhibited germination in proportion to depth; however, germination inhibition was independent of seed phytochrome photo-equilibrium, which had been diversified by seed pretreatment with light. Seedlings did not emerge when seeds were buried >8 cm deep. Recovery of ungerminated seeds showed that excessive burial did not impede seedling emergence but rather prevented seed germination. However, this induction of dormancy was lost once germination processes were activated (24–48 h at 20 °C) that made germination irreversible. Temperature was also involved in inhibition, and low temperature (<15 °C) induced the least inhibition. This is discussed in terms of processes of respiration and fermentation in buried seeds.  相似文献   

鲁梅克斯K-1杂交酸模简介及在我省的种植意见     

马有泉  车敦仁 《青海草业》1999,(4)

简要介绍了优质高产饲草作物—鲁梅克斯K-1杂交酸模的来源、生态习性、优良性状、适口性、利用方法、适植范围及在栽培利用时应注意的问题,提出了在我省的种植意见和建议。  相似文献   

鲁梅克斯K-1杂交酸模和干玉米秸混合青贮料喂牛试验     

王成章  高永革  韩彪  吴海梅 《河南畜牧兽医(综合版)》2001,22(2):8-10

８头４～５岁的役用秦川母牛按配对原则分为对照组和试验组。两组牛的精料配方基本相同，但试验组牛饲粮用７．７５％的鲁梅克斯Ｋ－１杂交酸模粉（以下简称鲁梅克斯Ｋ－１）代替对照组中同等重量的小麦麸；对照组牛的粗料全部用干玉米秸，试验组半用６０％干玉米秸和４０％的玉米秸＋鲁梅克斯叶混合青贮料。正试期２０ｄ。结果表明：试验组牛的平均日增重为 ０．７８７ｋｇ，对照组０．６９０ｋｇ，试验组较对照组牛日增重提高了 １４．０６％；每增重 １ｋｇ活重试验组牛消耗精、粗料分别为２．５４ｋｇ、５．２５ｋｇ，对照组半分别为２．９０ｋｇ、５．５０ｋｇ，试验组较对照组个节约精料０．３６ｋｇ、粗料０．２５ｋｇ；试验组每头牛毛盈利为７３．３４元，对照组５９．４０元，前者比后者提高经济效益２３．４７％。说明在役用母牛饲粮中，用鲁梅克斯粉代替精料中的小麦麸并用玉米秸＋鲁梅克斯混合青贮料能获得良好的生产性能和经济效益。  相似文献   

高寒干旱荒漠草原移栽鲁梅克斯K-1杂交酸模试验     

侯正录  达日其布  扬占魁 《青海畜牧兽医杂志》2002,32(6):13-14

在高海拔干旱草原上移栽鲁梅克斯杂交酸模，结果表明，鲁梅克斯能够正常生长，当年成活率可达87．18％，生长90天株高可达50cm以上，产鲜草量为2．0kg/株。越年后也能及早返青，生长60天株高可达57．18cm，产鲜草量为2．38kg/株。  相似文献   

高产优质饲料作物——鲁梅克斯K—1   总被引：7，自引：0，他引：7  

石定燧  熊军功  陈学迅  陈明烦 《新疆农业大学学报》1996,(4)

综述了由新疆民大实业发展公司１９９５年从国外引入新疆和黑龙江安达市种植的高产优质饲料作物——鲁梅克斯Ｋ—１的特征特性和饲用价值。该作物寿命长、春天返青早、抗寒、抗盐碱。花期株高２～２．５ｍ，年鲜草总产量１５０～２００ｔｈｍ－２，干物质含量１０．７９％～１１．９％，粗蛋白质（按干物质计）２９．８１％～３９．８１％，干草和青贮料家畜家禽均喜食，是猪、牛，特别是奶牛优质的青饲料作物  相似文献   

滇西北高山牧场入侵物种土大黄生态学调查   总被引：1，自引：0，他引：1  

申时才  Andrew WILLSON  David MELICK 《西南林学院学报》2006,26(3):11-14,19

2003年8月,对滇西北贡山县迪麻洛村色娃龙巴夏季高山牧场进行了植被和土大黄空间分布调查.结果表明:45%的样点中出现土大黄,9%的样点中覆盖率>25%;土大黄的出现与‘草地’景观、放牧强度、牧民住所的近远呈正相关,与海拔高度和坡度呈负相关;土大黄的分布和扩张与传统的轮牧体系息息相关.  相似文献   

Preservation of nitrifying capacity and nitrate availability in waterlogged soils by radial oxygen loss from roots of wetland plants   总被引：4，自引：0，他引：4  

W. M. H. G. Engelaar  J. C. Symens  H. J. Laanbroek  C. W. P. M. Blom 《Biology and Fertility of Soils》1995,20(4):243-248

The effects of radial O₂ loss from roots on nitrification and NO _inf3 ^sup- availability were studied. Plants of the flooding-resistant species Rumex palustris and the flooding-sensitive species Rumex thyrsiflorus were grown on drained and waterlogged soils with an initially high nitrifying capacity. Nitrate reductase activity in the plant leaves was used as an indicator of NO _inf3 ^sup- availability to the plants. In a separate experiment these species were shown to have higher levels of nitrate reductase activity when NO _inf3 ^sup- was added to the soils compared to when only NH _inf4 ^sup+ was provided. In drained soils nitrification was maintained and both plant species showed relatively high nitrate reductase activities in their leaves. In the water-logged series planted with R. thyrsiflorus, nitrification was inhibited, NH _inf4 ^sup+ accumulated, and the plants grew less well compared to those on drained soils. In contrast, waterlogged soils planted with R. palustris had a redox potential high enough for O₂ to be continuously replenished. Furthermore, the nitrifying capacity of these latter soils was maintained at a high level. R. palustris grew well and NO _inf3 ^sup- must have been available to the plant, since a high level of nitrate reductase activity was observed in the leaves.  相似文献   

鲁梅克斯K-1杂交酸模在盐渍化土地适应性栽培效果分析   总被引：3，自引：3，他引：0  

贺访印  杨自辉  胡明贵  刘虎俊  纪永福 《草业科学》2002,19(5):33-35

对临泽盐渍化土地栽培的鲁梅克斯K－1杂交酸模，进行了植物学特征、耐盐碱、抗寒性、营养价值，根系及土壤含盐量等性状的分析，发现鲁梅克斯K－1杂交酸模在含盐量1．15％土壤环境生长良好，其根组织能耐盐碱，且0－5cm土层含盐量可下降37．05％－50．58％，年可收获优质干草12．4t/hm^2，开发利用潜力巨大。  相似文献