对紫花苜蓿种子的重要害虫苜蓿籽蜂的生物学特性进行了研究。结果表明，苜蓿籽蜂在新疆呼图壁地区1年发生3代，主要以3龄幼虫在苜蓿种子内越冬。越冬幼虫于次年4月下旬开始化蛹，5月上旬开始羽化；7月上旬出现第1代成虫，7月下旬出现第2代成虫。成虫羽化多集中在白天10：00～14：00，平均性比约为1．34：1。不同营养条件对成虫寿命及产卵量的影响不同，其中以5％蜂蜜水饲养成虫寿命最长、产卵量最高。

This study was conducted to analyze biological characteristics of Bruchophagus roddi (Gussakovsky) of the main pests of alfalfa seeds.The result demonstrated that there were three generations in a year at Hutubi area in Xinjiang,and the third instar larvae overwintered in alfalfa seeds.Overwintered larva starts pupation in the next April and emergenced in in the first ten-day period of May.The first generation adult emergenced in the first ten-day of July,while the second generation adult emergenced in the third tenday of July.Adults were actively flying between 10:00-14:00,sex ratio was about 1.34∶1.There were different effects of different nutritional conditions on adult longevity and fecundity,of which the life of adults who were fed on honey water was the longest,their fecundity was the highest.

本次通过对新疆的昌吉、塔城、博乐三个地区若干苜蓿干草捆常规营养成分的测定，得出三个地区苜蓿干草营养成分存在差异，昌吉地区苜蓿干草品质较好，方捆苜蓿含水量与粗蛋白含量呈正相关，黄绿淋雨苜蓿品质较差。另外对整株鲜绿苜蓿在未开花、初花、盛花不同开花期常规营养成分进行检测，得出苜蓿在初花期时粗蛋白含量最高，整株鲜绿苜蓿粗蛋白含量显著高于方捆苜蓿。通过这些检测加深了对苜蓿干草品质的认识，为畜牧养殖户收购高品质苜蓿干草提供依据。

By measuring routine nutritional components of some alfalfa hay bales from Changji, Tacheng and Bole in Xinjiang, results showed that there were some differences in nutrition among these three areas. The alfalfa quality was best in Changji. There showed a positive correlation of moisture with crude protein content for square bales of alfalfa. The quality for harvest alfalfa but rained before hay was poor. Besides, the quality for alfalfa in different stages (not lfowering, early bloom, and full bloom) was determined and analyzed, it could be drawn a conclusion that alfalfa has the most crude protein content in early bloom stage. The whole plant of alfalfa has obvious advantage in protein content than alfalfa hay bales. It also be the foundation for farmers to purchase alfalfa with better quality.

为分析黄淮海地区农户种植苜蓿的影响因素，该研究以黄淮海地区的苜蓿种植主体—农户为研究对象，通过建立苜蓿种植面积供给反应模型，利用统计数据及调查数据，证明黄淮海地区农户苜蓿种植并不遵循种植周期内收益最大化原则。通过建立幼稚价格预期模型，计算了各因素对黄淮海地区苜蓿种植面积的影响程度，证明针对其他作物的种植补贴不会显著影响苜蓿种植面积，增加苜蓿供给能有效降低饲料粮供给压力。该研究提出苜蓿种植应当减少行政干预，增加良种、技术、信息的服务供给，培育苜蓿种植专业农户，并根据苜蓿的需求特点，结合畜牧业发展及环境改善需要，制定种养结合的苜蓿种植目标。该研究对于满足居民消费升级需求，促进黄淮海地区畜牧业健康发展与生态环境提升具有重要意义。

Planting alfalfa can not only promote the development of animal husbandry and meet the needs of the consumers for livestock, but also improve soil fertility and the ecological environment. Farmers are the main alfalfa growers in Huang-Huai-Hai region, in this paper, a supply response model of alfalfa planting area has been developed, with statistical data and investigation data, the effects of alfalfa prices and alfalfa area in last term were calculated. The results show that alfalfa planting area only depended on the alfalfa production price in last year and this means that the annual alfalfa price will influence the decision of farmers’ willingness of planting alfalfa.The elasticity of alfalfa planting area to alfalfa export price is 0.837, and the T value is 7.528. Above results proved that there was short-term speculation behavior for the alfalfa planting farmers in Huang-Huai-Hai region. Farmers in this area do not follow principle of maximum profit in alfalfa planting.

为研究紫花苜蓿鲜草对仔猪生长性能和血液理化指标的影响,选择体重20 kg左右健康的杜长大三元杂种仔猪60头,采用完全随机化设计分为4个处理,每个处理3个重复,每个重复5头猪,对照组不添加紫花苜蓿鲜草,3个试验组分别添加5%、10%、15%紫花苜蓿鲜草。结果表明,添加不同比例紫花苜蓿鲜草平均增重均高于对照组,其中5%、10%紫花苜蓿组显著高于对照组(P0.05);料重比随着紫花苜蓿鲜草添加量的增加而增大,但组间差异不显著(P0.05);每千克增重饲料成本以15%紫花苜蓿组最低(7.90元),5%紫花苜蓿组最高(8.17元)。干物质消化率随着紫花苜蓿鲜草添加量的增加而降低,15%紫花苜蓿组最低,极显著低于其余各组(P0.01);粗蛋白质消化率随着紫花苜蓿添加量的增加而降低,15%紫花苜蓿组最低,极显著低于其余各组(P0.01);粗纤维消化率随着紫花苜蓿鲜草添加量的增加而降低,3个试验组均极显著低于对照组(P0.01)。血清总蛋白、总胆固醇、甘油三酯4组间差异不显著(P0.05);血清尿素氮,对照组与3个试验组差异不显著(P0.05),15%紫花苜蓿组极显著高于5%紫花苜蓿组(P0.01);血糖,对照组与3个试验组差异不显著(P0.05),15%紫花苜蓿组极显著高于10%紫花苜蓿组(P0.01);高密度脂蛋白,10%紫花苜蓿组与15%紫花苜蓿组差异不显著(P0.05),但均显著高于对照组和5%紫花苜蓿组(P0.05)。结果显示,仔猪饲粮中添加紫花苜蓿鲜草能提高仔猪增重,对血液理化指标无不良影响。在本试验条件下,推荐紫花苜蓿鲜草适宜添加比例为5%~10%。

This experiment was to study the effect of alfalfa grass on the growth performance and physical and chemical indexes of blood of piglets,sixty healthy DLY ternary hybrid piglets with 20 kg height were randomly allocated to 4 treatments with 3 replicates of 5 pigs per replicate.The control group were not fed with the alfalfa grass,5%,10% and 15% proportion of alfalfa grass were added in the diet of 3 experimental groups.Results showed that when adding different proportion of alfalfa grass,the average daily gain were higher than that of the control group,and the 5%,10% proportion of alfalfa grass groups were significant higher than those of the control group (P 0.05).The feed cost per kilogram weight gain of the 15%proportion of alfalfa grass groupwas the lowest (7.90 Yuan),and the 15%proportion of alfalfa grass group was the highest (8.17 Yuan).With the adding proportion increasing,the dry matter digestibility decreased,the 15%proportion of alfalfa grass group was the lowest,and it was

为了有效开展苜蓿品种耐盐性评价及耐盐材料筛选,以5个国外苜蓿品种和4个国内苜蓿品种为材料,采用不同质量浓度NaCl处理(2、4、6、8、10g/L),探讨了盐胁迫对苜蓿种子主要发芽性状(发芽率、苗长、根长、苗质量、根质量)的影响。结果表明,盐胁迫对苜蓿种子发芽性状均有较大影响,随着NaCl质量浓度的提高,苜蓿种子发芽率降低,苗长和根长明显缩短,苗质量和根质量逐步下降,而且,高质量浓度盐胁迫对苜蓿种子发芽性状的影响尤为显著。不同苜蓿品种对盐胁迫的响应差异较大,对9个苜蓿品种种子5个发芽性状耐盐性的综合分析表明,三得利的种子耐盐性最强,而伊犁苜蓿的耐盐性最弱。

In order to carry out the salt tolerance evaluation of alfalfa varieties and select the salt-tolerant alfalfa varieties ,the effect of different concentrations of NaCl (2 ,4 ,6 ,8 ,10 g/L ) on the main seed germination traits including germination rate ,seedling length ,root length ,seedling weight and root weight was studied for five foreign alfalfa varieties and four internal alfalfa varieties .Results showed that the main seed germination traits were greatly affected by NaCl stress .With the increase of NaCl concentration ,the seed germination rate decreased significantly , the seedling length and root length shortened greatly ,and the seedling weight and root weight also reduced gradually .The influence of high concentration of NaCl on seed germination traits was particularly noticeable .There was great difference among the alfalfa varieties in the response to NaCl stress .The comprehensive analysis of five seed germination traits was also carried out for nine alfalfa varieties ,an