N-甲基-D-天冬氨酸对肥育猪生长及激素水平的影响

选取体重51 kg左右杜长大肥育猪84头,随机分为2组,每组设3个重复,2组分别饲喂添加0、50 mg/kg N-甲基-D-天冬氨酸(NMDA)的饲粮,试猪体重达88 kg时结束饲养试验,并对猪生长性能及血液相关激素指标进行分析,结果表明50 mg/kg NMDA可以显著影响猪的生长性能及内分泌水平,试猪日增重提高9.31%(P＜0.01),料重比降低7.16%(P＜0.02);血清生长激素含量提高了92.54%(P＜0.01),IGF-I水平增加了50.68%(P＜0.05),TSH、FT 3、FT 4的浓度分别提高了78.40%(P＜0.02)、123.33%(P＜0.01)和60.58%(P＜0.03),胰岛素水平提高了62.61%(P＜0.05).由此可见,NMDA可以显著影响猪的生长及血清相关激素水平.     

新疆森工技术进步贡献份额的测算

新疆森工企业是新疆林业的重要组成部分。森工技术进步率是全面考核林业综合水平的重要指标之一。本文根据新疆森工统计资料，首次采用增长速度方程、综合要素生产率指数、总因子生产率指数三种模型测算了新疆森工技术进步贡献份额（１９８１年到１９８６年）。结果表明，新疆森工年均技术进步率在０．５％～０．５２２％之间，技术进步对森工总产值增长的贡献份额在３４％～３６％之间。     

全国甘蔗野生种质资源的采集和考察

１９８５～１９９３年在全国进行了甘蔗野生种质资源的采集和考察。采集到甘蔗亚族（Ｓａｃｃｈａｒｉｎａｅ）内９个属１８个种的无性系共８２４份，种植在云南农业大学校园内（昆明黑龙潭），建立了甘蔗资源圃。考察了甘蔗属（Ｓａｃｃｈａｒｕｍ）、蔗茅属（Ｅｒｉａｎｔｈｕｓ）、河八王属（Ｎａｒｅｎｇａ）和芒属（Ｍｉｓｃａｎｔｈｕｓ）中主要野生种的地理分布、开花期、形态特征、繁殖方式、生态适应性、锤度和种质流失的情况。探明了割手密（Ｓ．ｓｐｏｎｔａｎｅｕｍＬ．）和斑茅（Ｓ．ａｒｕｎｄｉｎａｃｅｕｍＲｅｔｚ）的开花期与原产地纬度和海拔的相关，探索了割手密与蔗茅（Ｅ．ｆｕｌｖｕｓＮｅｅｓ）茎秆锤度与地理分布的联系。     

Analysis of Growth and Productivity of Indian Mustard (Brassica juncea) in Relation to FYM, Nitrogen and Source of Fertilizer

A field experiment was conducted during the winter seasons of 1992–93 and 1993–94 at Anand to study the effect of FYM, nitrogen and source of fertilizer on growth and yield of mustard [ Brassica juncea (L.) Czernj & Cosson]. The results showed significant variation in leaf area index (LAI), crop growth rate (CGR), dry matter production and seed yield. The direct effect of farmyard manure (FYM) was conspicuous in improving the growth of mustard. FYM application at 10 tonnes ha⁻¹ significantly increased the LAI, CGR and dry matter accumulation per plant at almost all the stages during first year study (1992–93) and in pooled analysis. Similarly, nitrogen application registered maximum LAI, CGR at 75 kg level and RGR and NAR at 50 kg level at almost all the during both years. Sulphur carrying source (Ammonium sulphate plus single super phosphate) increased all stages growth characters. Maximum dry matter accumulation per plant and seed yield were recorded with highest levels of FYM (20 tonnes ha⁻¹), N (75 kg ha⁻¹) and source having S. Seed yield was strongly associated with LAI and dry matter accumulation per plant at all the stages.     

Response of Mustard to Ethrel Spray and Basal and Foliar Application of Nitrogen

In a field trial conducted during 1992–93 and 1993–94, the effect of basal (B) nitrogen (N) (45 and 60 kg N ha⁻¹) and foliar application (F) of water (W) or 10 kg N ha⁻¹ and 400 or 600 ppm ethrel (E) (2-Chloro ethyl phosphonic acid) at 70 days after sowing was studied on leaf area index and dry mass at 90 days and pod number per plant, seeds per pod, 1000 seed weight, seed yield, oil content and oil vield at harvest of mustard ( Brassica juncea L. Czern & Coss.) cv. T-59. Recommended basal (B) application of 90 kg N ha (BN₉₀) was used as control. On the basis of 2 year data it was found that basal application of 60 kg N and foliar spray of 10 kg N ha ⁻¹ and 600 ppm ethrel gave higher values for growth and yield characteristics and enhanced seed yield and oil yield by 12.5 and 14.8%, respectively over control BN_90.     

沙区五种珍稀濒危植物水分生理指标测定及分析

本文在测定沙区５种珍稀濒危植物的水分生理指标的基础上，分析了其抗旱性，意在探讨适应干旱环境的特性。研究结果表明：矮沙冬青保水能力与吸水能力强，对干燥炎热的环境有很强的适应性；银沙槐蒸腾强度大，失水快，但吸水力强，补偿水分快；裸果木通过强的保水力适应干旱；绵刺以强的吸水力和抗脱水力适应环境；准噶尔无叶豆以体内水分自我调节作用适应大气干旱。     

CCC对葡萄试管苗生长的影响

ＣＣＣ对葡萄试管苗的茎叶生长有显著的抑制作用，茎的高度、节数及节间长度均有明显减少；ＣＣＣ对生根率没有明显影响，但对插段的生根数量有较大的影响，在一定浓度范围内（２０～８０ｍｇ／Ｌ）ＣＣＣ处理的生根数量有所增加，其中以４０ｍｇ／Ｌ时增加最多，为８．６７～８．９５条／段。但ＣＣＣ对根系伸长有明显的抑制作用，随着ＣＣＣ浓度的升高根长逐渐变短；从干、鲜重的变化来看，ＣＣＣ处理后墓叶的干、鲜重是随着浓度的升高而减少，但根系的干、鲜重在０～４０ｍｇ／Ｌ范围内呈略增加的趋势，４０ｍｇ／Ｌ以后则大幅度减少。     

Correlated Response to Selection for Protein Yield in Oats After Three Cycles of Recurrent Selection

Three oat (Avena saliva L.) populations (i.e., lines of descent), high grain yield (HG), high protein content (HP), and high protein yield per se (HGP), each developed by three cycles of S, recurrent selection, were evaluated for the effect of selection for groat-protein yield upon other agronomic traits. Selections making up the HG line of descent had high protein yield primarily due to high grain yield, and those selected for HP had high protein yield due to both high protein content and high grain yield. Selection in HGP was on the basis of protein yield per se. Selection caused increases in bundle weight, harvest index, vegetative growth rate, and seed number in all lines of descent. Heading date, plant height, and seed weight were unaffected, whereas groat percentage and test weight were decreased in HP and HGP. Heritabilities were high for heading date, plant height, test weight, and seed weight, moderate for harvest index and bundle weight, and low for groat percentage. Genetic variability generally declined from CO to C3 for all traits. Groat-protein yield and amount of protein per groat increased in all lines of descent. In HG, the increase in groat weight was due primarily to increases in the nonprotein fraction, with groat-protein content actually decreasing. In HGP, groat weight increased due to increases in protein and nonprotein fractions, and groat protein content remained constant. In HP, groat weight and amount of nonprotein per groat decreased, thus increasing groat-protein content. Three cycles of recurrent selection resulted in oat lines with groat-protein yields significantly higher than the highest lines from CO. Utilization of index selection may be desirable to obtain populations of greater breeding value.     

城市园林绿化现存问题、对策及其绿化植物配置原则

随着国民经济的不断发展，城市园林绿化已成为现代建设的重要内容。在归结上前城市园林绿化所存共性问题的基础上，针对城市园林绿化普遍存在的4方面问题，提出5点对策。     

乳酸菌与中药合生元对肉鸡生长性能及饲料利用率的影响

本试验分别向肉仔鸡日粮中添加等量的抗生素和乳酸菌与中药合生元制剂,通过测定肉仔鸡的各项生长指标和饲料利用率指标,探讨乳酸菌与中药合生元在肉鸡生长和饲料利用率方面替代抗生素的优势.结果表明,试验组与对照组在生长性能和饲料利用率上各指标均差异不显著（P〉0.05）,说明乳酸菌与中药合生元可以替代抗生素饲喂给肉仔鸡.