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81.
W—HE生物表面活化剂是黑龙江省农科院黑河农科所从俄罗斯引入的农业高科技产品,C—HE植物生长调节剂由我所研制。试验结果表明,能促进大麦生育前期生长发育,增加分蘖,抑制生育后期节间生长,增产效果明显。 相似文献
82.
不同活化剂对磷矿粉的活化作用 总被引:10,自引:0,他引:10
以沸石、膨润土、糠醛渣为活化剂,研究了不同活化剂对磷矿粉的活化作用,结果表明:沸石产地不同进对同一磷矿粉的增效作用不同,且沸石对磷矿粉的活化作用随土壤性质而异,在北方含Na^ 较高的盐化潮土上速效磷增加了182.9%,膨润土、糠醛渣作为活化剂也可提高磷矿粉中磷的释放。 相似文献
83.
BAO Peng-ju SUN Yao WANG Hai-hua ZHANG Gen-bao HU Qian-guo JIANG Jia-shen 《园艺学报》2014,30(10):1753-1759
AIM:To investigate the effects of protein C activator (PCA) from Agkistrondon acutusvenom (AAV) on the tension of thoracic aorta rings isolated from the rats with sepsis. METHODS:The model of sepsis was established by intraperitoneal injection of lipopolysaccharide (LPS). SD rats were randomly divided to 6 groups (n=6): sham group, LPS group, PCA intervention group (LPS+PCA, PCA at doses of 0.1 mg/kg, 0.3 mg/kg and 0.6 mg/kg) and LPS+ polymyxin B (at dose of 0.2 mg/kg) group. Using perfusion experiment in vitro, the tension of the aortic rings was measured by biological signal analytical system. RESULTS:The values of MABP, HR, LVDP and ±dp/dtmax were significantly lower in LPS group than those in sham group and LPS+PCA groups. Compared with sham group, the relaxation response to acetylcholine (ACh) and the contractile response of aorta rings induced by phenylephrine (Phe) were significantly decreased in LPS group, which were increased significantly in PCA intervention group (especially at dose of 0.6 mg/kg) compared with LPS group. The dose-response curve of aorta contraction with denuded endothelium induced by Phe shifted down significantly in LPS group compared with sham group, and no significant difference between LPS group and PCA intervention group was observed. Also no statistical difference was found in non-endothelium dependent relaxation of aortic rings induced by sodium nitroprusside among the groups. Pretreatment of N-nitro-L-arginine methl ester and methylene blue increased the contraction amplitude of aortic rings induced by Phe. CONCLUSION: PCA from AAV effectively reverses the hypoergia of the vessels in rats with sepsis through protecting vascular endothelium, the mechanism of which may be mediated by inhibiting NO-GC-cGMP signal transduction pathway. 相似文献
84.
周跃钢 《西南大学学报(自然科学版)》1997,19(5):468-471
在含15%(v/v)甘油和pH8.0的100mmol/LTricine缓冲液中,当离子浓度<150mmol/L时,K+和Na+离子是豇豆根瘤腺苷酸琥珀酸裂解酶(ASAL)的激活剂,其最适浓度约为75mmol/L,可分别提高酶活性40%和35%。Mg2+离子是ASAL的抑制剂,能拮抗K+和Na+离子的激活效应。HPO二4离子可显著降低酶活性,抑制效应与HPO二4离子浓度呈正相关。在含15%(v/v)甘油和pH6.6~8.0的100mmol/L磷酸盐缓冲液中,ASAL的最适pH值约为7.4,而在含15%(v/v)甘油和pH7.4~8.6的Tricine缓冲液中,ASAL的最适pH值约为8.2。 相似文献
85.
磷素活化剂对红壤磷形态及有效性影响的研究 总被引:3,自引:0,他引:3
在我国南方红壤中加入不同的磷活化剂进行培养试验,结果显示:磷活化剂提高了土壤有效磷含量,不同活化剂的活化能力不同。相关分析和通径分析结果表明,磷活化剂的活化能力大小顺序为:低分子有机酸钠钙盐>腐植酸>腐植酸钠>脲基甲酸乙酯;磷活化剂可以提高红壤中的Al-P、Ca-P和Fe-P等无机磷含量,其中Al-P和Ca-P与有效磷均达到极显著水平,而Fe-P作用效果不显著,可以通过影响Al-P和Ca-P来间接影响有效磷,磷活化剂会抑制土壤中O-P的生成。 相似文献
86.
以东北地区广泛栽植的露地花卉作为样材,选择北京圣吉奥生物肥料公司出品的土壤磷钾激活剂进行栽培试验。结果证明:土壤磷钾激活剂能够增加土壤肥力的利用率,有效激活土壤中的有效磷、有效钾,使其含量高达40%以上,使植株进行合理吸收;同时可以促使开花提前约7d、延长花期约10d;在加大花朵冠幅、增艳花卉色泽等方面也具有一定效果。 相似文献
87.
88.
Induced resistance to Fusarial wilt of banana by menadione sodium bisulphite treatments 总被引:3,自引:0,他引:3
The soilborne fungus Fusarium oxysporum f.sp. cubense is the causal agent of banana vascular wilt disease named Panama disease and one of the most serious threats to banana crops worldwide. A water-soluble addition compound of vitamin K3, menadione sodium bisulphite (MSB), first studied as a plant growth regulator, has recently been shown to induce resistance against Panama disease. Effective fungicides are not yet available to control this fatal disease. Here we report on two independent long-term experiments leading to the enhanced resistance response induced by MSB. The results demonstrated that MSB is an effective resistance activator in banana, and a potentially useful agent for the control of Panama disease. 相似文献
89.