Growth and Metabolic Changes of Cowpea Plants as Affected by Water Deficiency and Indole-3-Yl-Acetic Acid

Cowpea plants ( Vigna sinensis Savi.) were grown in pots for two successive years. These plants were daily maintained water holding capacities (15, 25, 45, 65 %).
The foliage of plants grown at every level of soil moisture was sprayed till dripping with IAA solutions (0, 10, 50, 100 mg/l) three times after 3, 6 and 9 weeks from sowing. Samples were taken at the two physiological stages before flowering and during flowering for growth measurements and determinations of nitrogen fractions.
Water shortage led to retardation of stem length, number of internodes, number of leaves and dry weight shoots. IAA increasing the same parameters only when applied at concentrations of 10 and 50mg/1 at moisture level 65 %, 45 % and 25 % of W.H.C.
Water stress decreased total-N and protein-N contents of cowpea shoots. On the other hand total soluble- N content was increased under the same conditions. IAA increased total-N and protein-N content of cowpea shoots. Meanwhile, the same growth regulator decreased total soluble-N when applied at 45% 25 % and 15 % W.H.C. levels.     

Study on Several Characteristics of Agaricus blazei Murril Strain J3 Irradiated by 60Co

A new mutant strain J3 from Agaricus blazei Murril was obtained by 60Co irradiation. The yields of successive generations were increased more than 70% to compare with their original strain. The component analysis on amino acids and fatty acid illuminated that the nutrient value of strain J3 fruiting body was better than the original strain. The apparent nodule structure was found in the hyphea of J3 strain through the observation by scanning electron microscope. RAPD analysis showed the great difference of PCR fingerprints between J3 and its original strain. It is a promising mutant strain for further commercial development in the future.     

‘梨红叶枯萎病’防治研究

‘梨红叶枯萎病’是湖北省一些碱性沙土梨园近年来出现的一种病害,受害梨树整株死亡,成片毁园,经研究证明此系缺硼引起。但梨树的需硼范围甚小,适宜的土壤速效硼含量指标大致为0.14～0.55×10~(-6),梨叶含硼指标,约为21～47×10~(-5)。施用不当,常会引起硼毒为害。     

麦麸纤维不同处理对雏鸡饲粮养分利用的影响

试验研究了膨化、碱化、酸化和纤维素酶解处理麦麸纤维对雏鸡饲粮养分利用的影响。与未经处理的对照组相比,碱化和酸化处理使各种养分的采食量都有显著提高(P<0.05);酶解处理使粗蛋白质排泄量极显著降低(P<0.01),各种处理都使粗蛋白质利用率明显提高;膨化和酸化处理使粗灰分的利用率提高(P<0.05);膨化处理使镁(P<0.05)和钾(P<0.05)排泄量降低,使镁(P<0.05)、钠(P<0.05)和钾(P<0.01)的利用率提高;酶解处理使钠排泄量降低(P<0.01),使利用率提高(P<0.01);碱化使钠排泄量提高(P<0.01),酸化使钠和钾利用率显著提高;各种处理对微量元素锌、铁、铜和锰利用率的影响都未达到显著水平(P>0.05)。     

苹果营养诊断新方法

应用营养元素在树体内的移动原理,比较同一新梢不同部位叶片营养元素含量的差异,判断营养元素是否发生迁移,进而诊断营养的丰缺状况。通过对10多个生产园的取样分析,对这一诊断方法的可行性进行了初步探索。结果表明,对易流动营养元素来说,此法有较好的适用性。     

对氨基苯胂酸对猪消化道及日粮营养物质消化率的影响

本试验以9头25kg左右的二元杂交阉公猪为试验动物,采用消化试验(全收粪法)以及屠宰后检测小肠肠壁组织的方法,通过对生长猪消化道肠壁组织以及猪对日粮营养物质消化作用的研究,探讨了日粮中添加60mg/kg对氨基苯胂酸对生长猪消化机能的某些影响。研究结果表明:与对照组或土霉素碱组日粮相比较。日粮中添加60mg/kg浓度的对氨基苯胂酸能够更好的促进生长猪的消化能力;并使干物质、有机物质和粗蛋白质的消化率分别较对照组日粮提高3.42％、2.35％和4.33％,使能量利用率提高2.51％,且各种氨基酸的利用率也得到相应的改善;同时,添加对氨基苯胂酸对猪消化道(十二指肠、空肠和回肠)肠壁组织(粘膜高度、腺体高度、腺体数、粘膜下层、肌层以及浆膜等)能更好的吸收营养物质也产生了较好的促进作用。     

三种观赏植物水培营养液配方初步研究

采用不同配方的营养液对彩叶凤梨、小叶榕和天竺葵进行了水培试验.结果表明:3 种植物对不同配方营养液有不同的适应性,大量元素为11.5 mg/L(以下单位同)NH4 -N 140.2 NO3--N 93.0 P 312.0 P 80.0 Ca 18.3 Mg 45.0 S的营养液(pH 6.12,EC 为1.32 ms/cm)较适合彩叶凤梨和小叶榕的生长,而天竺葵在大量元素为21.0 NH4 -N 137.2NO3--N 44.5 P 265.2 K 92.0 Ca 36.0 Mg 48.0 S的营养液(pH5.60,EC 为 1.35 ms/cm)中生长最好.     

Effect of BNP- mediated cAMP-PKA signaling pathway on bFGF expression in rats with spleen-qi deficiency syndrome

AIM: To explore the changes and the mechanism of heart functions in the rats with spleen-qi deficiency syndrome. METHODS: The rats were randomly divided into blank control group and spleen-qi deficiency model group. The changes of cardiac functions in the rats were determined by ultrasonic imaging with a high-resolution in vivo imaging system. HE staining was used to observe the pathological changes. The protein expression of brain natriuretic peptide (BNP) in the myocardium was assessed by Western blotting. The contents of BNP and cAMP in the serum and myocardium were measured by ELISA. The mRNA expression of basic fibroblast growth factor (bFGF) and protein kinase A (PKA) was detected by real-time PCR. RESULTS: Compared with blank control group, the myocardial cells in the model group had different degrees of necrosis and degeneration. Stroke volume and ejection fraction were decreased. The contents of cAMP and BNP in the serum and myocardium were increased in model group. The protein expression of BNP and the mRNA expression of bFGF and PKA were also increased.CONCLUSION: Spleen-qi deficiency syndrome causes heart function decline in rats. The expression of BNP, cAMP, PKA and bFGF is all increased.     

A hematologic and blood chemical study of Swedish purchased calves.

The hemoglobin (Hb), packed cell volume (PCV), erythrocytes (R.G.), serum iron (SI) and unsaturated iron binding capacity (UIBG) were examined in a total of 386 purchased calves for the duration of 1 year. The calves were tested within 3 days of arrival at the buyer’s herd. The average age of the calves was 28 ± 10 days ().The results may be summarized as follows:

1. Approx. 35% of the calves had Hb values ≦ 10.0 g/100 ml.
2. Fifteen% of the calves had ≦ 6.0 × 10⁶ R.C. per µl.
3. Fifty-three calves or about 14% showed SI values ≦ 40 µg/100 ml and 131 calves or 34% ≦ 80 µg/100 ml.
4. Twenty-seven % of the calves had UIBG values > 501 µg/100 ml.
5. Almost half the calves (48%) had a saturation percentage of transferrin with iron below 20% and 138 calves (36%) below 15%.

These figures among others in the study indicate that 13–35% of the purchased calves suffered from iron deficiency anemia.