共查询到19条相似文献，搜索用时 284 毫秒
1.
研究两种刈青高度对饲用杂交甘蔗闽牧101的影响，结果表明：产量方面草层在200cm刈青时（B处理），年可刈青2-3次，年平均鲜草产量达154．61t／hm^2，干草产量达31．76t／hm^2，显著高于草层在120cm刈青时（A处理），每年刈3-4次，年平均产量达84．00t hm^2。A、B两处理的分蘖数随刈次的增加均逐渐增加，且B处理前两次的分蘖数高于A处理，冬春季节同一时间刈青的分蘖数，A处理显著高于B处理。叶茎比A、处理大于B处理，叶量较大。日生长量及干物质含量B处理均高于A处理。建议采用草层高度在200cm刈青，可显著提高产量，且切碎饲喂肉牛可提高阈牧101的利用率。 相似文献
2.
为了筛选适于我国南方栽培的饲用红麻品种,在闽南地区对8个饲用红麻品种进行产量、品质、适口性等方面研究。结果表明,供试饲用红麻品种1号和6号综合表现较好,其鲜茎叶产量分别达25.4t/hm2和23.6t/hm2;粗蛋白含量分别达19.42%和22.84%;鲜茎叶饲喂肉牛适口性一般,青贮后外观品质属中等偏上青贮料,饲喂肉牛适口性好。 相似文献
3.
收获时期与分蘖去留对饲用甜高粱产量及含糖的影响 总被引：1，自引：0，他引：1
就不同收获时期分蘖去留对饲用甜高粱产量及含糖率的影响进行田间试验,结果表明,饲用甜高粱保留分蘖不同收获时期平均产量126.37t/hm2,较掰除分蘖增产24.5%。随着收获时间的延迟,产量、茎秆含糖率均呈上升状态,收获时期以10月10日最佳,分蘖去留平均产量和茎秆含糖率分别达131.74t/hm2和11.45%；霜冻后产量大幅下降,降幅达25.7%~30.7%。 相似文献
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5.
引进7个豆科饲用灌木在贵州南部地区进行生态适应性研究,结果表明:在贵州南部地区能正常开花结实的有多花木蓝、羽叶决明、木豆、猪屎豆和云南羊蹄甲等5个品种;抗旱、耐瘠薄、鲜干草产量、种子产量较高的品种为多花木蓝(年均鲜干产量为54.24 t/hm2和16.49 t/hm2,种子产量为2 430.04 kg/hm2)、羽叶决明(年均鲜干产量为31.54 t/hm2和6.47 t/hm2,种子产量为1 727.53 kg/hm2)、木豆(年均鲜干产量为15.44 t/hm2和4.90 t/hm2,种子产量为2 345.89 kg/hm2),其粗蛋白质含量为16.77%~26.07%,是贵州南部地区值得推广利用的优良豆科饲用灌木。 相似文献
6.
《中国麻业》2019,(4)
以"川饲苎2号"为材料,探索首茬刈割时期(以下简称"首刈期")及留茬高度对饲用苎麻产量、品质等的影响。结果表明:川饲苎2号首刈期从常规时期(70～80 cm)至延期20 d内,鲜草均具有较高的综合饲用价值(相对饲用价值RFV≥109.3,粗蛋白CP≥18.0%);延期30 d,其综合饲用价值大幅度降低。留茬15 cm处理的总株数(20.56万株/公顷)、出苗率(92.2%)最高,缺蔸率(5.0%)最小;留茬10 cm处理的鲜草产量(117.96 t/hm2)、干生物产量(16.36 t/hm2)、地下根茎生物量(17.47 kg)均最高;留茬0 cm处理的饲草产量低,其根蔸生长明显受到影响,不利于苎麻生长,缺蔸情况严重。 相似文献
7.
为确定华北平原饲用油菜高产优质的适宜播期，选用甘蓝型油菜品种4个，设置4个播期，研究不同播期下温度对饲用油菜鲜草产量和饲用品质的调控效应。结果表明，随播期推迟，饲用油菜生育期内日均温与有效积温升高，花前生育期天数缩短但花后生育期延长，总生育期天数缩短2～7 d。饲用油菜鲜草产量随播期推迟呈降低趋势，3月28日前播种超过35 t/hm2；品种间华油杂62鲜草产量显著高于其它品种（P<0.01）。饲用油菜鲜草产量和饲用品质与纤维含量显著负相关，中性洗涤纤维含量与苗期的有效积温量极显著负相关，与营养生长和花后有效积温量显著正相关。因此，在华北平原春播饲用油菜可选用华油杂62，播期以3月8日-3月18日为最佳，鲜草产量稳定在50 t/hm2以上，具有较高的粗蛋白、淀粉、水溶性碳水化合物和总可消化养分含量，可实现华北平原饲用油菜的高产优质生产。 相似文献
8.
冀西北高原旱地追氮梯度对饲用青玉米产量及品质的影响 总被引：4，自引：0，他引：4
为给冀西北高原饲用青玉米大面积种植提供科学的施肥依据,本研究就追氮对饲用青玉米产量及品质的影响进行了分析。结果表明,追氮可显著提高饲用青玉米的产量以及秸秆粗蛋白、真蛋白和氨基酸含量。追氮138kg/hm2时,白马牙玉米的鲜重和干重产量都达最高,分别为45089.9kg/hm2和9378.7kg/hm2,氮肥的增产效果也最高,每施1kg氮可增加干重40.44kg;同时,玉米秸秆粗蛋白、真蛋白含量分别为7.84%和1.97%,比对照分别增加了105.2%和131.1%;秸秆赖氨酸含量高达0.28%。 相似文献
9.
木薯饲用型品种的筛选 总被引：5，自引：1，他引：4
通过正交试验法,对现有的木薯优良品系进行对比,以筛选出适宜于刈割的饲用型新品种以及对应的配套栽培技术。试验结果表明：木薯新品系ＺＭ９０３６和ＺＭ８６３９在块根产量、茎叶产量、茎叶粗蛋白产量以及抗风能力等主要特性方面均相当或超过对照种华南２０５,可进一步示范推广。植后４－８个月对植株进行刈割则对块根产量造成较大的影响,在这段时间里摘顶时间越早对块根产量的影响越大。但通过刈割可大大提高木薯嫩茎叶和粗蛋白的产量,同时可大大增强植株的抗风能力。 相似文献
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11.
湘饲纤兼用苎1号是从地方品种咸丰大叶绿的自然变异单株中系统选育的新品种,既可以作为饲用苎麻栽培也可以作为常规纤维用苎麻栽培。2年5点饲用区域试验结果显示:鲜产量为123148.9~138624.7kg/hm^2,平均鲜产量131936.9kg/hm^2,比对照增产17.15%~20.34%,且丰产稳产性好;粗蛋白含量在22.5%,优于对照,粗纤维含量18.5%、粗脂肪含量6.5%、灰分含量13.6%、钙含量3.6%,均低于对照,磷含量0.4%左右,与对照无差异。纤维用区域试验结果显示:平均纤维产量2599.5kg/hm2,比对照平均值低5.2%左右;生产试验平均纤维产量为2676kg/hm2,减产6.5%以内;平均纤维支数2394.8支,比对照湘苎3号和中苎1号分别提高15.22%、22.06%。表明湘饲纤兼用苎1号是一个高产优质的饲纤兼用苎麻新品种。 相似文献
12.
本研究的目的是对"中苎1号"和"中苎2号"苎麻的营养价值进行初步评价,为苎麻作牧草利用提供参考。试验结果表明,苎麻的营养品质优于黑麦草和象草,和苜蓿相近;80cm收割高度下苎麻的叶、茎粗蛋白含量和叶茎比均显著高于100cm和120cm(P0.05)的收割高度,叶、茎粗纤维含量则显著低于100cm和120cm(P0.05),同时干物质产量和粗蛋白产量均显著高于60cm(P0.05),生长时间相对100cm和120cm分别缩短了8d和13d。此外,"中苎1号"在80cm收割高度下的粗蛋白日增产速率显著高于其他收割高度(P0.05)。综上可知,"中苎1号"和"中苎2号"可以做牧草开发利用。综合考虑干物质产量、营养品质、生产时间及成本,"中苎1号"和"中苎2号"在"二麻"高温期间整株收获作为反刍动物的饲草开发利用时,80cm左右是最佳的收割高度。 相似文献
13.
Simon Ineichen Svenja Marquardt Michael Kreuzer Beat Reidy 《Grass and Forage Science》2020,75(4):385-397
To maintain species-rich swards from which forage of a high nutritional quality can be produced, it is essential to adapt grassland fertilization strategies. In this study, we investigated how different long-term mineral fertilization treatments affect dry-matter (DM) yield, plant species composition, and nutrient and mineral concentrations of forage from mountain grasslands. During 2 years, forage was sampled from three different long-term fertilization experiments located at 930 (L), 1,190 (M) and 1,340 (H) m a.s.l. at different sites in Switzerland. At each site, three mineral fertilization treatments (0, PK and NPK) had been maintained for three to six decades, with two (L and M) or three harvests (H) per year. Yield, the botanical composition and concentrations of net energy, utilizable crude protein and different phenolic fractions were determined. Nutrient and mineral concentrations were also determined. For all three sites (L, M and H), unfertilized swards had lower annual DM yields (3.39, 5.17 and 2.73 t/ha) compared to PK (6.33, 7.17 and 4.44 t/ha) and NPK fertilized swards (7.69, 7.22 and 7.44 t/ha), respectively. Long-term fertilization had little effect on the gross nutrient and phenolic composition, but forage P and K concentration increased. The decades-long fertilization of either PK or NPK of up to 85 kg N, 80 kg P2O5 and 240 kg K2O/ha reduced plant species richness only at site H. Fertilization of PK may allow to simultaneously increase forage productivity and maintain forage quality in mountain grasslands. 相似文献
14.
通过田间微区模拟试验,以中苎1号、湘苎2号和湘苎3号为材料,研究苎麻对镉（Cd）胁迫的响应及其吸收铅（Pb）、铜（Cu）、锌（Zn）和镍（Ni）的能力。结果表明：供试3个品种均有较强的Cd耐受能力（耐受Cd的阈值为11．7mg·kg^-1）,其中湘苎3号耐受Cd的能力最强,在Cd添加量为0～100mg·kg^-1时,其有效株为15．7—29．0株/m^2、生物量为0．67～1．01kg·m^-2、原麻产量为55．4—76．8g·m^-2,显著高于其它2个品种;随着土壤Cd添加量的增大,3个品种地上部的Cd含量及其累积量均显著增加,最高可迭61．5mg·kg^-1与49．6mg·m^-2,表明苎麻对cd具有较强的富集能力,但并未达到Cd的超富集植物的水平;Cd胁迫条件下,3个品种对Pb、Cu、Zn、Ni等重金属的吸收因元素种类的不同而异,中苎1号对Pb、Ni吸收呈现出随土壤Cd添加量增大而增加的趋势,湘苎3号对Zn、Ni吸收则呈现出随土壤Cd添加量增大而减少的趋势,但土壤Cd添加量对3个品种吸收Cu的影响并不明显。同时,苎麻还具有较好的经济效益且不进入食物链,是一种理想的修复与利用重金属污染土壤的备选植物,但镉胁迫对苎麻吸收Pb、Cu、Zn、Ni等重金属的影响机制尚需进一步研究。 相似文献
15.
SPAD值与杂交狼尾草施氮水平和农艺性状的关系 总被引：4，自引：2，他引：2
采用盆栽试验探讨利用叶绿素计(Chlorophyll Meter SPAD-502)预测杂交狼尾草粗蛋白含量和牧草的施氮水平.试验设5个氮肥水平(纯氮量0,100,200,300,400k9/hm2)和3次重复,利用叶绿素计读取不同氮水平不同时期杂交狼尾草倒数第3片叶子的SPAD值,同时测定部分农艺性状和茎叶粗蛋白含量.结果表明,杂交狼尾草的SPAD值和粗蛋白含量是随着牧草的生长而逐渐降低,分蘖数、株高和生物产量随着牧草的生长而提高;杂交狼尾草的SPAD值与其施氮水平、分蘖数、株高、产量和茎叶粗蛋白含量都成正相关,与牧草的株高相关性最小且都不显著;与牧草的分蘖数和产量相关性大,接近或达显著水平:与牧草的茎叶粗蛋白含量相关性最大,均达显著或极显著水平.因此,利用SPAD值可用来预测杂交狼尾草茎叶粗蛋白含量,进而诊断杂交狼尾草的氮素营养水平,为牧草的合理施肥提供依据. 相似文献
16.
Harvest management based on leaf stage of a tetraploid vs. a diploid cultivar of annual ryegrass 
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下载免费PDF全文 Leaf stage‐dependent defoliation is linked to the plant's physiological status and may be a more suitable criterion than time‐based intervals for harvesting forage grasses, but no reports of research with annual ryegrass (Lolium multiflorum Lam. var. westerwoldicum) were found. To address this, a 2‐year field study was carried out at Raymond, MS, on a Loring silt loam soil (fine‐silty, mixed, thermic Typic Fragiudalfs). Forage production, morphological characteristics and nutritive value responses to defoliation based on leaf stage (2, 3 and 4 leaves per tiller) and two residual stubble heights (RSH; 5 and 10 cm) of a tetraploid (“Maximus”) vs. a diploid (“Marshall”) cultivar of annual ryegrass were quantified. Forage harvested, in 2011, increased linearly as leaf stage increased from 7.3 to 8.8 Mg/ha, but during 2012 was least (7.0 Mg/ha) at 3‐leaf stage and similar at the other two leaf stages (7.6 Mg/ha). Tiller density was less for Maximus (1,191 tillers/m2) than for Marshall (1,383 tillers/m2). Leaf blade proportion decreased with increasing leaf stage and was greater by 9% for Maximus than for Marshall. Generally, forage nutritive value became less desirable with increasing leaf stage. There was a dichotomy in forage harvested and nutritive value responses, but maximum forage productivity was achieved when annual ryegrass was defoliated at the 4‐leaf stage interval. 相似文献
17.
Shahryari R Gurbanov E Gadimov A Hassanpanah D 《Pakistan journal of biological sciences: PJBS》2008,11(10):1330-1335
The present research characterized yield and yield components of 42 wheat genotypes after terminal drought stress. The experiment was in twice replicated simple rectangular lattice design, conducted at irrigated and terminal stress conditions during 2006-2007. These study genotypes had significant differences for grain yield at level of 1%. Genotypes 4057, Viking/5/Gds/4.., Sabalan and 5041 respectively with 6.313, 6.159, 5.793 and 5.774 t ha(-1) had the highest yield and Gascogen has the lowest yield with 2.561 t ha(-1). Mean of total grain yield for under study genotypes was 5.628 t ha(-1) in non-stress and 3.305 t ha(-1) in drought stress conditions. Drought stress decreased amount of grain yield 2.323 t ha(-1) that was noticeable. Interaction of Genotype x environmental conditions was significant at probability level of 1% for grain yield. Yield of all genotypes in drought condition was lower than non-stress condition. Genotypes Viking/5/Gds/4/Anza/3/Pi.., Sabalan, 4061,4057 and 4041 had more yield in non-stress condition and MV17/Zrn, Sabalan, Saysonz and 4032 in stress condition. Stress intensity pay attention to total grain yield was 42%. Genotypes Viking/5/Gds/4/.. and Sabalan had high grain yield and was better than other genotypes and controls (Toos and Crosse Shahi), according to GMP, STI and MSTI. And had the most amount of stress tolerance index as compared with other genotypes confirms this subject. Correlation of yield with other traits was not significant in non-stress condition. In drought condition, correlation of grain yield with 1000 grain weight and total number of tillers per plant was positively significant. ANOVA showed significant differences between osmotic pressures for coleoptile length, between genotypes for mean and maximum coleoptile length and between interactions of genotypes x osmotic pressures for mean and maximum coleoptile length. Mean comparisons showed the highest total, mean and maximum coleoptile length in -7 bar PEG+I ml L(-1) potassium humate treatments. Genotypes Sardari and Sabalan had the highest amounts of total, mean and maximum coleoptile length. With due attention to interaction genotype x osmotic pressures, genotypes Sardari, Sabalan and 4057 in -7 bar PEG+1 ml L(-1) potassium humate had the most amounts of noted characters than others. In conditions of this experiment, potassium humate caused increase in tolerance rate of genotypes against drought stress. 相似文献
18.
饲用苎麻收割高度对产量和粗蛋白质含量影响的研究 总被引：3，自引：3，他引：3
本试验的研究结果表明:随着收割高度的增加,粗蛋白含量逐渐降低,收割高度从40cm至70cm,粗蛋白含量从平均22.67%降低至19.77%,但叶粗蛋白含量变化不明显。收割高度每增加10cm,饲料干料667m2产量约增加40kg,生育期约延长9天。综合考虑饲料产量、营养成分(粗蛋白含量)和生产成本,苎麻作为蛋白饲料开发,整株收割高度应在70cm以下。 相似文献
19.
D. A. Lambert 《Grass and Forage Science》1966,21(3):208-213
An experiment is described in which timothy, grown for production of seed, was cut once annually on dates ranging from 23 October to 24 May. New tillers in selected plants were labelled at monthly intervals during autumn and winter for 2 years, to determine the pattern of production of tillers and to assess the reproductive development of categories of tillers. The majority of tillers were produced in autumn, but production was continuous throughout the winter. There was a big increase from the first to the second year in the total number of tillers produced, but neither the pattern nor amount of tiller production was affected by cutting. The % of fertile tillers was highest in the oldest tillers, and was affected little by the increase in the number of tillers from the first to the second year; cutting had little effect on the % fertility except where floral primordia were removed by the cut on 24 May. In all treatments at least 90% of the ears at harvest were produced by tillers initiated the previous autumn. The penetration of light to the base of the plants was increased considerably by cutting, but it is concluded that interception of light by the whole plant is more beneficial than an increase in the penetration of light into the plant and a concomitant reduction in the total interception of light by the plant. 相似文献