共查询到18条相似文献，搜索用时 265 毫秒
1.
无覆盖废弃物载体组合植生建坪效果的研究 总被引：5，自引：0，他引：5
依据无幼布草坪植生带建植原理,以几种生活废弃物为载体,无覆盖条件下对各废弃物载体组合植生物建坪效果进行研究。结果表明,草坪草与废弃物载体组合协调及植生效果的优劣次序为ＣＬＧ〉ＮＬＴ〉ＮＰＴ〉ＣＡＴ〉ＣＰＧ〉ＮＡＧ;在以各类废弃物为载体的植生带生产中,选择好草种和废弃物载体组合是成败的关键。 相似文献
2.
废弃物生产地毯式草皮的研究 总被引：1，自引：0，他引：1
以废弃物为铺网进行地毯式草皮培植及其铺坪建植，并对培植草皮、草皮铺坪建植生能指标进行了研究。结果表明，由于同草种废弃物铺网不同，培植草皮性能差异相对较大，铺网生产性能差异相对较小；除个别废弃物外，多数废弃物生产地毯式草皮均十分理想。草种不同，草皮及铺坪效果也不同。因此，生长快、根系发达并对铺网适应性好的草种是理想草种。 相似文献
3.
以废弃物为铺网进行地毯式草皮培植及其铺坪建植,并对培植草皮、草皮铺坪建植性能指标进行了研究.结果表明,由于同草种废弃物铺网不同,培植草皮性能差异相对较大,铺网生产性能差异相对较小;除个别废弃物外,多数废弃物生产地毯式草皮均十分理想.草种不同,草皮及铺坪效果也不同.因此,生长快、根系发达并对铺网适应性好的草种是理想草种. 相似文献
4.
废弃报纸植生带建坪主要指标的模拟研究 总被引：3，自引：1，他引：2
依据无纺布草坪植生带建植原理,以生活废弃报纸为载体,对３种草坪植物植生效果主要指标进行了模拟研究,结果表明;多年生黑麦草成坪效果最好,最熟禾居中,匍茎剪股颖最差。其成坪指数比为：多年生黑麦草：早熟禾：匍茎剪股颖＝２８．５９：７．７１：１。证明在以废弃报纸为栽体的植生带生产中,选用种子穿透力强的草坪植物是可行的。 相似文献
5.
大有发展前途的草坪植生带 总被引：3，自引：0，他引：3
植生带是在无纺布(即不经过纺织的以再生棉为原料生产的一种布)上均匀、高密度地播下优质的纯净草籽,上面盖一层无纺布,经过针刺复合定位后的产品。植生带具有发芽早、杂草少、贮藏、运输容易,铺设简便等特点。草坪植生带产品的产生改变了以往只靠草皮移栽法绿化和美化城市的传统做法。草坪植生带是在工厂里大批生产的,既能节约劳力、运力,又能降低绿化成本,加快城市绿化步伐。齐齐哈尔草坪植生带厂自从1987年5月建厂到现在,在北京、吉林、大庆、内蒙等地共铺种、移栽和推广植生带的面积为180万平方米。从这几年铺设植生带的情况看,无论是整体的出苗整 相似文献
6.
用植生带法建植草坪的研究表明:选择草地草熟禾、高羊茅及多年生黑麦草按5:4:1比例混播制成的植生带,采取床土覆沙、充分压平、及时浇水、定期修剪、适时追肥、及时防除病虫害是植生带草坪建植成功的关键。 相似文献
7.
8.
回顾了国内关于具有优良水土保持性能的草本植物的系列研究,认为当前筛选出的水土保持型草种主要集中于禾本科,也包括豆科、桑科的少数种;其应用范围多见于公路边坡和坡耕地,缺乏对其水土保持效果持久性的评价。今后应针对各类受损生态系统的立地条件,加强优良野生草种的筛选与利用,探讨并建立多草种组合及草灌间植的模式,提高水土保持效益。 相似文献
9.
10.
11.
Seeding rangeland following wildfire is a central tool managers use to stabilize soils and inhibit the spread of invasive plants. Rates of successful seeding on arid rangeland, however, are low. The objective of this study was to determine the degree to which water availability, invasive plant abundance, and seeding technology influence postfire seedling establishment. Across four fire complexes, whole plots were either seeded using a rangeland drill, seeded by hand where seeds could be placed at an exact depth, or left as unseeded controls. Irrigation and weeding treatments were applied to subplots within whole plots in an incomplete factorial design. In three of the four fires, seeding method was the single factor limiting establishment with seedling density over sevenfold higher in the hand-seeded compared to the drill-seeded treatments. In contrast to our hypotheses, water and weeding had no positive effect on seedling establishment in any of the four fires; however, background weed density was relatively low. The native community recovered at all sites with minimal bunchgrass mortality. These results strongly suggest a need for a decision framework that evaluates postfire seeding needs relative to natural recovery. Based on these initial results, it appears modest improvements in seeding technology may yield substantial increases in seeding success. 相似文献
12.
以"特高"多花黑麦草(Lolium multi florumcv. ‘Tetragold’)和光叶紫花苕(Vicia villosa var. glabrescens)为材料,利用冬闲田研究其单播和混播的生产性能和种间竞争变化。结果表明,多花黑麦草与光叶紫花苕混播组合均可提高饲草产量,达14125.05~17730.52kg·hm-2,比单播多花黑麦草提高14.08%~43.19%,比单播光叶紫花苕提高54.67%~94.15%。在整个生长利用期,多花黑麦草的生物量在各次刈割中均占主导地位,在混播群落中竞争力一直超过光叶紫花苕,处于竞争优势地位。产草量、生长竞争态势以及群落结构的综合分析证明,二者以50%多花黑麦草+50%光叶紫花苕混播饲草产量最高,组分构成适宜,为最佳混播种植模式。 相似文献
13.
近年来,饲料蛋白质原料价格持续走高,中国饲料蛋白质原料紧缺并且长期依赖进口。因此,寻找并开发新型的蛋白质源已成为当前解决饲料蛋白原料紧缺的研究热点。黑水虻(Hermetia illucens L.)是一种双翅目水虻科的营腐生性昆虫,可将有机废弃物快速转化成为高附加值生物物质,具有饲养成本低、繁殖速度快、产出高的明显优势,其含有丰富的氨基酸、抗菌肽(antimicrobial peptides,AMPs)和几丁质等多种生物活性物质,其蛋白质和脂肪含量高,因而有望成为高质量动物饲料。大量研究表明,黑水虻部分替代饲料蛋白质成分可有效增强动物机体免疫和抗氧化能力,同时通过正向调节肠道有益微生物种群及增加菌群丰度的方式,起到改善动物肠道健康的作用,其作为一种颇具前景的蛋白质饲料原料有望为畜牧养殖业找到新的突破口。作者简述了黑水虻的营养特性、主要活性成分,系统总结了饲粮中添加黑水虻对猪禽肠道屏障、免疫机能及肠道菌群影响的最新研究进展,并对黑水虻今后的研究思路及发展方向进行了展望,以期为黑水虻的进一步开发研究和在动物养殖生产中的推广应用提供参考依据。 相似文献
14.
In our experiments we tested 11 kinds of different lignocellulose materials by means of the method in vitro according to Mellenberger et al. (1970) for a determination of their digestiblity. In experiments carried out with beech sawdust treated with 0.1 M of sulphuric acid a digestibility of 3.7% was found, in sawdust treated with 0.47 M of nitric acid a digestibility of 61.6% was found and after a neutralization with ammonia it amounted to 72.2%. Wood fibre (WF-1) treated enzymatically showed a digestibility of 28.6% and in the WF-2 complemented with newsprint paper it amounted to 33.4%. Untreated beech waste -- forest billets -- showed a low digestibility (5.6%) and that of zero fibre was somewhat higher (12.6%). Difibered beech sawdust showed a digestibility of 44.0% and the digestibility of the biomass prepared from lye waste obtained during the production of cellulose fibres amounted to 74.1%. Waste fibre also showed a high digestibility of 76.0%. Straw enriched with yeast proteins (SL-1) showed a digestibility of 58.0%. Cellulose used as a standard in the course of the testing of lignocellulose materials showed the highest digestibility -- 82.3%. 相似文献
15.
在山东省东营市农业科学研究院试验基地,以黄淮海当家紫花苜蓿品种中苜3号为试验材料,采用随机区组设计,设播种量(7.5, 15.0, 22.5 kg·hm-2)和行距(15, 30, 40 cm)两个因素,研究了盐碱地条件下不同播种量和行距对紫花苜蓿干草产量和品质的影响,旨在为苜蓿生产确定最佳播种量和行距配置,为发展盐碱地苜蓿产业提供科学依据。结果表明,1)播种量对3年总产量无显著性影响(P>0.05),但对播种当年产量有极显著影响(P<0.01),播种量22.5 kg·hm-2的3年总产量最高,产量随播种量增加呈不断提高的趋势;行距对3年总产量有极显著性影响(P<0.01),行距15 cm的3年总产量最高,随着行距的增加产量呈减小趋势;行距对播种当年的产量影响较大,随着生长时间的延长,行距对产量的影响逐渐减小;播种量为22.5 kg·hm-2、行距为15 cm组合的3年总产量最高。2)播种量和行距对每m2枝条数和枝条重有显著性影响(P<0.05),随着播种量的增加和行距的减小,每m2枝条数呈增加的趋势,枝条重则呈减小趋势。产量与每m2枝条数始终呈正相关关系,与枝条重呈负相关关系,均达到极显著水平(P<0.01)。3)随着播种量的增加和行距的减小,粗蛋白(crude protein,CP)含量和相对饲喂价值(relative feed value,RFV)有上升的趋势,中性洗涤纤维(neutral detergent fiber,NDF)和酸性洗涤纤维(acid detergent fiber,ADF)含量有下降趋势;播种量为22.5 kg·hm-2、行距为15 cm时营养价值最高。4)从高产和品质综合考虑,在播种量22.5 kg·hm-2和行距15 cm配置情况下,有利于提高苜蓿的产量和品质。综上,在山东以及黄淮海盐碱地区以种植耐盐碱苜蓿品种为宜,不同播种量和行距对产量的影响有随生长期的延长而减少的趋势,在适宜播种量和行距配置条件下,有利于提高苜蓿的产量和品质。 相似文献
16.
《Strength and Conditioning Journal》2020,73(5):687-693
Revegetation of exotic annual grass−invaded rangelands is a primary objective of land managers following wildfires. Controlling invasive annual grasses is essential to increasing revegetation success; however, preemergent herbicides used to control annual grasses prohibit immediate seeding due to nontarget herbicide damage. Thus, seeding is often delayed 1 yr following herbicide application. This delay frequently allows for reinvasion of annual grasses, decreasing the success of revegetation efforts. Incorporating seeds into herbicide protection pods (HPPs) containing activated carbon (AC) permits concurrent high preemergent herbicide application and seeding because AC adsorbs and renders herbicides inactive. While HPPs have, largely in greenhouse studies, facilitated perennial bunchgrass emergence and early growth, their effectiveness in improving establishment of multiple species and functional groups in the field has not been assessed. Five bunchgrass species and two shrub species were seeded at two field sites with high imazapic application rates as bare seed and seed incorporated into HPPs. HPPs significantly improved establishment of sagebrush (Artemesia tridentata Nutt. Spp. wyomingensis Beetle & Young) and crested wheatgrass (Agropyron cristatum [L.] Gaertn.) over the 2-yr study. Three native perennial grass species were protected from herbicide damage by HPPs but had low establishment in both treatments. The two remaining shrub and grass species did not establish sufficiently to determine treatment effects. While establishment of native perennial bunchgrasses was low, this study demonstrates that HPPs can be used to protect seeded bunchgrasses and sagebrush from imazapic, prolonging establishment time in the absence of competition with annual grasses. 相似文献
17.
放牧型黑土滩人工草地建植与利用技术规范 总被引：1，自引：0，他引：1
该规范制定了黑土滩退化草地上建植放牧型人工草地的建植区域、草种选择和组合、播种方式、播种期、播种量、播种深度、围栏、鼠害控制、农艺措施、建植后的合理利用和管护等内容。对于迅速恢复黑土滩退化草地植被,发展草地畜牧业具有重要的指导意义。 相似文献
18.
《Strength and Conditioning Journal》2008,61(5):475-484
Cheatgrass (Bromus tectorum L.) is the most widespread invasive weed in sagebrush ecosystems of North America. Restoration of perennial vegetation is difficult and land managers have often used introduced bunchgrasses to restore degraded sagebrush communities. Our objective was to evaluate the potential of ‘Vavilov’ Siberian wheatgrass (Agropyron fragile [Roth] P. Candargy) to establish on cheatgrass-dominated sites. We examined Vavilov establishment in response to different levels of soil nitrogen availability by adding sucrose to the soil to promote nitrogen (N) immobilization and examined cheatgrass competition by seeding different levels of cheatgrass. We used a blocked split-split plot design with two sucrose levels (0 and 360 g · m−2), two levels of Vavilov (0 and 300 seeds · m−2), and five levels of cheatgrass (0, 150, 300, 600, and 1 200 seeds · m−2). Seeding was conducted in fall 2003 and 2004, and measurements were taken in June 2004, 2005, and 2006. Sucrose addition decreased availability of soil nitrate but not orthophosphate. In the first year after seeding, sucrose reduced cheatgrass density by 35% and decreased both cheatgrass biomass per square meter and seed production per square meter by 67%. These effects were temporary, and by the second year after seeding, there was a sevenfold increase in cheatgrass density. As a result, the effects of sucrose addition were no longer significant. Sucrose affected Vavilov growth, but not density, during the first year after seeding. Vavilov density decreased as cheatgrass seeding density increased. Short-term reductions in N or cheatgrass seed supply did not have long-term effects on cheatgrass and did not increase Vavilov establishment. Longer-term reductions in soil N, higher seeding densities, or more competitive plant materials are necessary to revegetate areas dominated by cheatgrass. 相似文献