东明县菜园集乡利用林地搞养殖

2008年4月,东明县菜园集乡村民欲投资5万余元建养鸡场。在选址中,菜园集乡国土资源所积极协调引导他们不占用耕地,采取节约集约用地方式,在多方考查论证的基础上选择了利用2hm^2成林地作为养鸡场。成林地无法种植农作物,但很适合搞养殖,草料、小虫可以做为鸡的补充饲料,鸡的粪便又可以促进树木的生长,既形成了生态养殖,又集约利用了土地资源。     

EM培养物在断奶仔猪中的应用

在饲料中添加EM(effective microorganism)培养物，对断乳仔猪进行饲养和疾病防治试验。结果表明：添加EM或EM培养物的试验I组和试验Ⅱ组及治疗组的平均增重比对照组平均增重分别高出2．26kg、2．34kg和1．27kg。试验I组、试验Ⅱ组和治疗组的平均增重与对照组的平均增重间的差异在1％水平上显著；试验I组和试验Ⅱ组的平均增重间差异不显著。试验I组、试验Ⅱ组和治疗组的料重比分别比对照组降低0．19、0．18、0．11。试验组的发病率为6．7％，对照组的发病率为40％，而防治组中患白痢的仔猪在4d内完全康复。故在仔猪饲粮中添加EM培养物，可提高饲料利用率和仔猪的生长速度，及增强机体抗病力。     

Phosphorus budget of redeye mullet （Liza haematocheila T. ＆ S.） under graded feeding levels

Experiment on phosphorus budget of redeye mullet （Liza haematocheila T. ＆ S.） was conducted at water temperature 21℃ and salinity 33. The results showed that the growth phosphorus （phosphorus that allocated into growth, GP） increased from -30.84% to 15.83% by feeding on graded amount of diets （starvation, 1%, 2%, 3%, 4% body weight and satiation）. The GP linearly increased with feeding levels （FL） as GP （mg） = - 0.785 ＋ 0.604 FL, and at satiation the relationship between GP and body weight （BW） was GP （mg） = 1,5991 BW0.7685. In the budget, IP （intake phosphorus） = GP ＋ FP （faecal phosphorus） ＋ EP （excretion phosphorus）. FP showed an irregular tendency with different feeding levels, and EP decreased with increasing feeding levels but rebound at satiation. The P budget at satiation was 100IP = 15.84 GP ＋ 64.62 FP ＋ 19.55 EP.     

不同形式钴对凡纳滨对虾生长和组织钴含量的影响

为研究氨基酸鳌合钴对凡纳滨对虾的营养效果．在凡纳滨对虾配合饲料中添加5、10、15mg／kg的氯化钴和蛋氨酸钴。饲养8周．4周末（饲养中期）称重．8周末称重并采集对虾肝胰脏和肌肉．测定肝胰脏和肌肉中的钴含量。结果表明：钴的添加形式和钴水平不影响对虾0～4周增重率．15mg／kg蛋氨酸钴显著提高了对虾0～8周增重率，且两种形式的钴之间差异显著（P〈0．05）。5、10mg／kg的蛋氨酸钴和5、10、15mg／kg的氯化钴不影响8周末对虾的增重率。特定生长率、饲料系数和蛋白质效率的变化趋势与增重率类似。钴的添加形式和钴水平不影响肌肉中的钴含量。15mg／kg的氯化钴组肝胰脏中钴含量显著高于对照组（P〈0．05）．其他各组间无显著差异；蛋氨酸钴各组肝胰脏中钴含量无显著差异；钴的添加形式不影响肝胰脏中钴含量。统计结果表明。促进生长方面，两种钴之间存在显著差异，蛋氨酸钴的营养效果好于氯化钴。饲料中蛋氨酸钴的添加量为15mg／kg时．对虾生长最快．5mg／kg时．可满足需要。     

复合中草药对凡纳滨对虾生长和消化酶活力的影响

选用豆粕-鱼粉型饲料,分别添加0.0、0.5、1.0、2.0和4.0g·kg-1的复合中草药(CTMs),检测其促生长作用及其对消化酶活性的影响。结果显示,生长第1阶段:2组特殊生长率(SGR)、饲料系数(FCR)和蛋白质效率比(PER)均显著大于对照组(P<0.05),与余下三组差异不显著(P>0.05);2组、3组体长增长率(LGR)与对照组差异显著(P<0.05);2组、3组存活率与5组差异显著(P<0.05)、与对照组差异极显著(P<0.01);各组间相对增重率(RWG)和日生长速度(AGR)差异不显著(P>0.05)。生长第2阶段:2组AGR与对照组差异极显著(P<0.01),与其他三组差异不显著(P>0.05);2组、3组FCR分别与对照组差异显著(P<0.05)和差异极显著(P<0.01);2组、3组PER与对照组差异显著(P<0.05);和对照组相比,4组成活率提高显著(P<0.05),2组和3组提高极显著(P<0.01);RWG和LGR变化规律与第一阶段相似;各组间SGR无显著差异(P>0.05)。CTMs提高消化酶活性,对蛋白酶活性影响明显。     

企业被吊销营业执照可否补办土地使用权证？

案情简介 A公司是一家以生产饲料添加剂为主的化工企业,位于N市科园大道,于1993年在N市工商行政管理机关注册成立,在2000年取得某宗地土地使用权证书。     

Effects of feeding and stocking density on digestion of cultured Atlantic salmon Salmo salar L.

The combined effects of feeding rate （0.8%, 1.0%, and 1.2% initial body weight/day）, feeding frequency （two, three, and four times/day） and stocking density （10, 15, and 20 kg/m3） in recirculating aquaculture systems （RAS） on growth performance, digestion and waste generation of Atlantic salmon （Salmo salar L.） were investigated in an 8-week orthogonal experiment （L9（3）3） with a constant daily water renewal at 7.50% of total volume. No mortality occurred during the experimental period. Feed conversion ratio （FCR） varied from 0.90 to 1.13 and specific growth rate （SGR） ranged from 0.48% to 0.69%/day. SGR, thermal growth coefficient （TGC） and FCR were not significantly （P〉0.05） affected by the three factors, while net protein utilization （NPU） was significantly （P〈0.05） affected. Apparent digestibility coefficients （ADC） of dry matter in the present study were in the range 66.12%-73.55%. ADC in protein, lipid and energy were statistically different among all treatments and in the range of 90.07%-93.67%, 81.54%-89.15%, and 67.55%-71.87%, respectively. The proportion of mean total ammonia nitrogen excreted ranged from 1.37% to 1.64% of feed nitrogen at steady state, and the concentration of nitrogenous and phosphorus compounds were differently correlated to the three factors. The results will provide valuable reference data for culture management decisions in the Atlantic salmon farming industry.     

Effect of Dietary Potassium on Growth,Nitrogen Metabolism,Osmoregulation and Immunity of Pacific White Shrimp （Litopenaeus vannamel） Reared in Low Salinity Seawater

An 8 weeks feeding experiment was conducted to determine the effect of dietary potassium on the growth and physio-logical acclimation of Pacific white shrimp （Litopenaeus vannamei） reared in diluted seawater （salinity 4）. Six semi-purified practical diets containing 0.59, 0.96, 1.26, 1.48, 1.74, and 2.17 g potassium K＋ per 100 g diet were formulated, respectively. The survival and feed conversion rate did not show significant difference among groups of shrimps given these diets （P〉0.05）. The shrimps fed the diets containing 0.96-1.48 g K＋ per 100g diet gained the highest weight, specific growth rate, and protein efficiency ratio. Their ammonium-N excretion rate as well as hemolymph concentration of Na＋ and C1- were significantly lower than those of the control （P〈0.05）, but a reverse trend was observed for their gill Na＋/K＋-ATPase. Moreover, the shrimps fed with 1.48 g K＋ per 100 g diet were the highest in hemolymph urea level, and the phenoloxidase and lysozyme activities were significantly higher than those of the control （P〈0.05）. The growth and physiological response of the test shrimps suggested that diet containing 1.48 g K＋ per 100 g diet improved the growth of L. vannamei in low-salinity seawater, and enhanced the physiological acclimation of the organism.