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以抗蓟马苜蓿品种甘农 9 号(Medicago sativa cv. Gannong No. 9)、感蓟马苜蓿品种甘农 3 号 (Medicago sativa cv. Gannong No. 3)和高感蓟马苜蓿品种 WL363HQ(Medicago sativa cv. WL363HQ) 为试验材料,紫花苜蓿苗期接种不同头数(0、4、5、6 头/枝条)的蓟马成虫,取食 5 d 后比较不同抗性苜蓿品种叶片中次生代谢物质(黄酮、单宁、木质素)含量和防御酶(过氧化物酶(POD)、苯丙氨酸解氨酶 (PAL)、多酚氧化酶(PPO))活性的变化。结果表明：随着蓟马头数的增加,供试苜蓿品种的黄酮、单宁和木质素含量均显著高于 CK(P＜0. 05)。5、6 头/枝条处理时,甘农 9 号的单宁含量分别较甘农 3 号显著提高了 53. 49%,47. 70%;较 WL363HQ 分别显著增加了 71. 52%,58. 60%(P＜0. 05)。甘农 9 号的木质素含量在 5、6 头/枝条处理下均显著高于甘农 3 号和 WL363HQ,增幅分别为 5. 60%,3. 50% 和 6. 13%,3. 96%(P＜0. 05)。蓟马取食胁迫显著提高了供试苜蓿品种的 POD 和 PAL 活性,显著降低了 PPO 活性(P＜0. 05)。甘农 9 号的 POD 和 PAL 活性在 5 头/枝条处理下较甘农 3 号分别显著增加了 2. 60%,1. 09%;较 WL363HQ 分别显著提高了 1. 36%,3. 54%;6 头/枝条处理后甘农 9 号的 POD 和 PAL 活性均显著高于甘农 3 号(5. 19%,9. 36%)和 WL363HQ(2. 58%,11. 18%)(P＜0. 05)。 相似文献
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21个苜蓿品种主要农艺性状关联分析与综合评价 总被引：3，自引：0，他引：3
为了明确苜蓿主要农艺性状与产量关系以及不同品种资源的生产特性,应用相关和灰色关联度对国内外21个苜蓿品种的主要农艺性状进行了关联性分析和生产性能综合评价。结果表明:生长速度,株高和鲜干比与干草产量的相关系数分别为0.87,0.86和0.55,存在极显著相关(P<0.01),同时灰色关联度较大,分别为0.8360,0.8330和0.7716,故这3个性状与干草产量之间有较大的关联性;单位面积植株数、一级分枝数和二级分枝数与干草产量不存在显著相关(P>0.05),且灰色关联度较小,分别为0.5921,0.6267和0.7406,与干草产量之间的关联性相对较小。通过最优关联度综合评价,甘农5号、金皇后、WL363HQ、WL319HQ和三得利与标准品种的关联度较大,在宁夏灌区生产性能表现较好;而敖汉、草原3号和甘农2号与标准品种的关联度较小,生产性能表现较差。 相似文献
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为改善和加速甘肃省酒泉地区牧草商品化、产业化、规模化发展,对引自国内外的9个优质紫花苜蓿品种(甘农3号、阿尔岗金、金皇后、WL343、阿迪娜、公农1号、中苜1号、新农3号、苜蓿王)在酒泉金塔县进行了适应性比较,研究其耐寒性、丰产性和营养品质。结果表明,不同苜蓿品种间的越冬率和青干草产量间差异较大。通过综合分析,阿迪娜、金皇后、公农1号、WL343、甘农3号的适应性、丰产性和营养品质均优于其他品种,稳定性较好,适宜在酒泉地区推广种植。 相似文献
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10个紫花苜蓿品种在晋北农牧交错带的适应性研究 总被引：1，自引：0，他引：1
选用9个引进品种和1个国产品种连续两年(2016~2017年)测定其物候期、越冬率、产量及干草品质,应用灰色关联度分析法比较其适应性,旨在为晋北农牧交错带紫花苜蓿(Medicago sativa)产业发展提供基础依据。结果表明:WL366HQ,三得利(Suntory)和皇后(Empress)生长较快;WL354HQ越冬率显著(P0.05)高于WLHQ353;三得利和WL298HQ的产草量显著(P0.05)高于甘农4号;WL366HQ、三得利和皇后相对饲用价值较高;通过灰色关联度综合评价不同紫花苜蓿品种适应性表明三得利(0.921 9)、WL366HQ(0.891 4)、WL298HQ(0.867 6)和皇后(0.852 5)4个苜蓿品种在晋北农牧交错带具有较好的适应性,可在晋北地区推广种植。 相似文献
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《黑龙江畜牧兽医》2017,(1)
为了对播种当年18个苜蓿品种根系形态特征进行评价,试验测定了苜蓿根颈直径、入土深度、分枝数、主根直径、主根长度、侧根直径、侧根数、侧根深度等指标。结果表明:各品种苜蓿根系形态指标差异明显。利用根系形态特征的8个指标对18个苜蓿品种进行聚类,可分为四类,第一类根系形态相近的包括巨能551(Magna551)、驯鹿(AC Caribou)、标靶(PGI427)、甘农3号和55V12;第二类根系形态相近的包括骑士-2(2010)、甘农6号和56S82;第三类根系形态相近的包括敖汉苜蓿、陇中苜蓿、挑战者(Survivor)、WL343HQ;第四类根系形态相近的包括54V09、55V48、康赛(Concept)、WL440HQ、WL168HQ、WL363HQ。 相似文献
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9个苜蓿品种引种对比试验研究 总被引：3，自引：0，他引：3
为满足畜牧业发展的要求,选育出适宜哈密地区两县一市种植的紫花苜蓿品种,2005～2007年对引自国内外的9种紫花苜蓿品种进行引种对比试验,通过物候期、株高、产量、干鲜比、茎叶比等各个指标的观测得出:甘农三号苜蓿、新牧一号杂花苜蓿、敖汉苜蓿产量较高,美国金皇后苜蓿、三得利苜蓿、美国WL232苜蓿次之,中牧一号苜蓿最低;三得利和美国WL232苜蓿茎叶比较高,甘农三号苜蓿最低;综合评价:9个苜蓿品种中,甘农三号苜蓿、新牧一号杂花苜蓿、敖汉苜蓿、美国金皇后苜蓿、三得利苜蓿、美国WL232苜蓿的综合性状好,产量高且稳定,草质好,适宜哈密地区推广种植。 相似文献
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通过田间试验测定不同紫花苜蓿品种的株高、分枝数、茎叶比、生物量、出苗率和越冬率,评价16个紫花苜蓿品种在河西走廊盐碱地的适应性,遴选出适宜河西走廊盐碱地种植的紫花苜蓿品种。结果表明:参试的16个紫花苜蓿品种,骑士T、SR4030和巨能的出苗率较高,甘农3号的出苗率最低;16个紫花苜蓿品种间株高差异不显著(P0.05);BR4010、WL343HQ、阿迪娜、亮苜2号和WL363HQ的分枝数显著大于标靶和金皇后的分枝数;岩石和德宝的叶茎比显著高于金皇后和骑士3的叶茎比;德宝、亮苜2号和骑士T的产量大于其他品种;亮苜2号和骑士3的越冬率显著高于甘农3号和SR4030的越冬率;阿迪娜和WL343HQ的倒伏率最小,骑士T和标靶的倒伏率最大。以株高、分枝数、茎叶比、生物量、出苗率和越冬率为变量因子,通过聚类分析将16个紫花苜蓿品种聚为6类,综合评判结果认为,亮苜2号、骑士T、德宝适宜种植于河西走廊盐碱地。 相似文献
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为评价紫花苜蓿不同品种在宁夏引黄灌区的越冬性能,测定了10个紫花苜蓿品种的株高、分枝数、根颈入土深度和根颈直径、干草产量等农艺性状,并使用灰色关联度法和系统聚类分析进行综合评价和分类。结果表明:紫花苜蓿6个农艺性状与越冬性关联度顺序依次为:干草产量>越冬率>株高>根颈直径>根颈入土深度>分枝数,灰色关联度为WL354HQ>WL903HQ>WL326GZ>WL353HQ>WL363HQ>WL343HQ>WL319HQ>WL366HQ>WL168HQ>WL298HQ;10个紫花苜蓿品种越冬性通过系统聚类分析可分为2大类4小类,以WL354HQ,WL903和WL326GZ品种在宁夏引黄灌区的越冬能力最强。 相似文献
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为探明苜蓿成株期耐盐性评价方法并筛选耐盐苜蓿资源,采用多个鉴定指标对30份苜蓿品种进行耐盐性综合评价。试验采用大田鉴定法,以株高、鲜重产量、综合评价等3个指标为评价依据,以无棣苜蓿为对照,对30份紫花苜蓿种质的耐盐性进行了综合评价。结果表明:供试的30个苜蓿品种中,耐盐之星、WL366HQ、WL354HQ、WL656HQ、WL525HQ、WL903、WL168HQ、WL363HQ、WL353LH、巨能995、WL440HQ、维多利亚、巨能7、中苜6号、中苜3号、WL298HQ、WL712、SR4030和WL319HQ的产量与无棣苜蓿相比增产比较高,耐盐性较好,适合在黄河三角洲推广应用。 相似文献
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饲料中无机磷和有机磷的测定方法 总被引：8，自引：1，他引：7
用分光光度法测定了饲料中的总磷、无机磷、有机磷的含量,将饲料样品处理成溶液,在酸性条件下,磷酸根离子与矾钼酸铵试剂形成黄色配合物,在420nm处测定吸光度,方法操作简便、快速、准确,回收率为97.4%～101.8%。 相似文献
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以“坝选３号”胡麻为材料，研究了不施磷、低磷、中磷和高磷４ 个不同施磷（Ｐ２Ｏ５）水平（０，３５，７０ 和１０５ｋｇ／ｈｍ２）对胡麻植株中磷素累积、转运、分配和磷肥利用效率的影响。结果表明，低磷、中磷和高磷水平时，胡麻各器官不同生育阶段磷素养分吸收和累积量的基本趋势一致，但其变化量与施磷量有极大关系。胡麻地上茎、叶、非籽粒和籽粒中，磷素的日增量增幅因器官而异；胡麻只有叶片中有磷素转移，中磷处理比低磷和高磷处理磷转移量增加５４．９３％～７３．８３％和８．１９％～１０．００％（P＜０．０５），籽粒中２０．４６％～３５．９３％ 的磷素是靠叶片转运而来。胡麻植株磷素累积主要在生殖生长阶段，占整个生育期总累积量的７９．０２％～９２．１７％。施磷（Ｐ２Ｏ５）量为７０ｋｇ／ｈｍ２时磷肥表观利用率和农学效率最高，分别为２０．２２％～２０．５３％和７．３０～７．４４ｋｇ／ｋｇ。胡麻产量随施磷量增加而增加，增幅最高达２８．９６％～３１．４６％。结合产量与磷肥表观利用率和农学效率，本实验区同等肥力土壤条件下，以施磷（Ｐ２Ｏ５）量为７０ｋｇ／ｈｍ２（中磷）为宜。 相似文献
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A balance study was performed in order to quantify the effect of continuously increased phosphorus (P) intake on faecal and urinary P excretion. The aim was to quantify the level of intake where regulatory P excretion becomes relevant for comparative digestibility measurements on P, and when the pig adapts its urinary P excretion to increased P intake. Phosphorus intake of growing pigs was continuously increased on a daily basis starting at a marginal level and P excretion via faeces and urine was continuously followed for 92 days. Two semi-synthetic diets were prepared with different proportions of Na2HPO4 resulting in 2.4 (diet 1) and 6.3 (diet 2) g P/kg DM. Concentration of Ca was adapted to achieve a Ca supply approximately 3.1 fold the digestible P supply. Six castrated male crossbred pigs (31 kg BW) were kept individually in metabolism crates after they had undergone a 14 d P depletion period during which they were fed diet 1 solely. Pigs received 1.04kg of diet 1 per day throughout the experiment, and each day the amount of feed and P supplied to pigs from diet 2 was increased by 12 g and 69 mg, respectively. ME supply was approximately 2.4 fold maintenance and average daily BW gain of pigs during the entire experiment was 690 +/- 30 g. While intake increased linearly, faecal excretion of P and Ca increased non-linearly and could be best described by third order polynomial functions. The proportion of ingested P not excreted via faeces followed a quadratic type of curve with a maximum of 81% at 25 days on experiment and P intake of 4.0 g/d. Thereafter, the proportion decreased continuously. The digestibility of P from diet 2, determined by the slope ratio technique, was constant and not affected by P intake up to a P intake of 5 g/d. Renal P excretion did not exceed inevitable losses until day 60 and increased exponentially thereafter when body P reserves were restored. It is concluded, that an adaptation to surplus P supply occurred earlier on the intestinal than on the renal level. While faecal P excretion appeared regulated depending on the actual requirement for P retention, the regulation via urine depended on the P status of the pig. Once the renal P excretion of growing pigs exceeds a level of 25 mg/d, intake of digestible P cannot be regarded sufficiently low to measure P digestibility as a capacity of the feedstuff. 相似文献
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The relative bioavailability of P in 5 sources of inorganic P was determined using growing pigs. The 5 sources of inorganic P were dicalcium phosphate (DCP), monocalcium phosphate (MCP) containing 50% MCP (MCP50), MCP containing 70% MCP (MCP70), MCP containing 100% MCP (MCP100), and monosodium phosphate (MSP). A total of 11 diets were formulated. The basal diet was formulated to contain 0.10% P, and 10 additional diets were formulated by adding 0.07 or 0.14% P from each of the 5 P sources to the basal diet. Growing pigs (n = 44; initial BW: 16.8 ± 4.3 kg) were individually housed and randomly allotted to the 11 experimental diets. Feed was provided on an ad libitum basis throughout the 28-d experimental period. At the conclusion of the experiment, all pigs were killed, and 4 bones (i.e., the third and fourth metacarpals on both front feet) were harvested. Bone-breaking strength, bone ash, and Ca and P concentrations were determined. The concentration of bone ash increased (P < 0.05) as MCP50, MCP70, MCP100, or MSP were added to the basal diet, and the concentration of bone P also increased (P < 0.05) as MCP70, MCP100, or MSP were added to the basal diet. The relative bioavailability of P in each of the feed phosphates was determined using slope ratio methodologies based on breaking strength, and expressed relative to MSP. The slope of the regression line for diets containing MSP or MCP100 was steeper (P < 0.05) than the slope for pigs fed the diet containing DCP, but not different (P > 0.05) from that of pigs fed diets supplemented with MCP50 or MCP70. In conclusion, P in MSP and MCP100 is more bioavailable than P in DCP, but there were no differences within MCP sources. 相似文献
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长期定位施肥条件下紫色土无机磷形态演变研究 总被引：8，自引：0，他引：8
应用蒋柏藩-顾益初无机磷分级体系对22年长期定位施肥试验紫色土0~100 cm土层无机磷形态进行分级测定,研究了各形态的无机磷在土壤剖面的分布及演变规律。结果表明,长期施用化学磷肥以及有机无机肥配施处理的土壤全磷、有效磷和各形态无机磷均较试验前有不同程度的增加,且以猪粪+NPK(M+NPK)处理土壤增加最多,其中有效磷含量增加了6倍;不施肥(CK)和单施氮肥(N)的处理土壤有效磷、全磷和各形态无机磷出现了下降,其中有效磷含量分别降低了51.1%和53.5%。除了Fe-P 和Ca10-P含量下层高于上层外其余各形态无机磷都表现为耕层高于下层的特征。各处理Ca2-P、Al-P、Ca8-P、O-P等无机磷的剖面分布较为相似,均呈20~60 cm下降比较迅速,80~100 cm变化不大或者稍微上升的趋势,而Fe-P则表现为下层含量高于耕层。相关分析表明各组分无机磷对紫色土有效磷的贡献为Ca2-P(0.9569)>Al-P(0.9265)>Ca8-P(0.9100)>Fe-P(0.8277)>Ca10-P(0.7449)>O-P(0.7362)。长期有机无机肥配施可以显著增加磷素在土壤中的累积,并能减少土壤对磷素的固定,增强其在土壤中的移动,促进土壤磷素向有效态转化。 相似文献
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1. In 2 experiments the effects of dietary phosphorus on relationships between plasma inorganic phosphorus concentration (Pi), shell and egg production and depletion states were measured in brown laying hens. 2. In a 12-week experiment dietary phosphorus concentrations from conventionally deficient (1.6 g non-phytate-phosphorus (PNP)/kg) to moderate excess (3.9 g PNP/kg) had little effect on egg and shell production, although there was evidence that plasma Pi concentration, when not influenced strongly by shell formation, reflected dietary phosphorus content. 3. Among birds at each dietary phosphorus concentration there was a negative linear relationship between shell weight of early eggs in the sequence and plasma Pi concentration. The relationship was apparently not affected by dietary phosphorus concentration. 4. Continued feeding of the deficient diet to 61 weeks of age did not have effects on body weight, egg and shell production, other than those associated with age, but plasma Pi and bone measurements indicated marginal phosphorus depletion. 5. In another experiment excessive dietary phosphorus (11.9 g PNP/kg) fed in a cross-over design caused small adverse effects on shell production, increased food intake and body weight and increased plasma Pi content, while there was no relationship between shell weight and plasma Pi concentration. 6. The results are consistent with an indirect effect of plasma phosphorus accumulation on shell formation, probably via an inhibitory effect on skeletal calcium release, in addition to any effect of excess dietary phosphorus on intestinal calcium availability. 7. Phosphorus requirement and status in the laying hen are complicated by the failure to recognise the contribution of digestible phytate-phosphorus to the available phosphorus supply. 相似文献
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Chong Wang ;Zhen Liu ;Diming Wang ;Jianxin Liu ;Hongyun Liu ;Zhiguo Wu 《畜牧与生物技术杂志(英文版)》2014,(4):479-484
Background：Phosphorus（P） supplementation is costly and can result in excess P excretion.This study investigated the effects of reducing dietary P on milk production and P excretion in dairy cows over a full lactation.Method：Forty-five multiparous Holstein dairy cows were divided into 15 blocks according to expected calving date and previous milk yield,and assigned randomly to one of the three dietary treatments：0.37,0.47,and 0.57%P（DM basis）;these P levels represent the NRC recommendations,Chinese recommendations,and the amount of dietary P commonly fed by Chinese dairy farmers,respectively.Average daily feed intake was calculated from monthly data on feed offered and refused.Milk yields of individual cows were recorded weekly,and milk samples were taken for analysis of protein,fat,solids-not-fat,lactose,and somatic cell count.Blood samples were collected on days-6,-3,0,3,6 relative to calving,and then monthly throughout lactation,and analyzed for P and Ca concentrations.Spot samples of feces and urine were collected for 3 consecutive d during weeks 12,24,and 36,and P concentrations were analyzed.Reproduction and health data were recorded.Results：Dietary P did not affect dry matter intake or milk yield（P〉 0.10）.Milk fat content was slightly higher in cows fed 0.37%P than in cows fed 0.47%P（P = 0.05）.Serum concentrations of P and Ca did not reflect dietary P content（P〉 0.10）.Fecal and urinary P both declined linearly（P〈 0.05） as dietary P decreased from 0.57 to0.37%.Fecal P content was 25%less when dietary P was 0.37%compared to 0.57%.Health events and reproductive performance were not associated with dietary P content（P〉 0.05）.Conclusions：Lowering dietary P from 0.57 to 0.37%did not negatively affect milk production,but did significantly reduce P excretion into environment. 相似文献
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Subsequent to a possum (Trichosurus vulpecula) poisoning operation purportedly using 1% phosphorus baits, six dogs with access to poisoned possums died of phosphorus poisoning. Two dogs survived, following treatment with oral copper sulphate and parenteral vitamin K. Clinical signs included depression, jaundice, vomiting and bloody diarrhoea. Post-mortem lesions included large areas of subcutaneous, interstitial and intermuscular haemorrhage, subserosal haemorrhage and liver degeneration. Free phosphorus was detected in the ingesta of three of the dogs which died up to 7 days after the last of the poison was laid. Analysis of two batches of baits used showed P levels of 1.17% and 1.24%. 相似文献