共查询到20条相似文献，搜索用时 62 毫秒
1.
以法A15为试材,在现蕾后以喷施清水为对照,进行了微肥万代富、高纯硼、三天灵和多元微肥磷酸二氢钾4种微肥的叶面喷施效果试验。结果表明：万代富1000倍液、高纯硼1200倍液、三天灵1000倍液和多元微肥磷酸二氢钾500倍液喷施效果较好。分别较对照增产7．0％、9．8％、7．6％和8．3％。 相似文献
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不同叶面肥喷施红薯效果比较试验结果表明,红薯根外喷施国光氨基酸600倍液、稀土500倍液、磷酸二氢钾250倍液的处理分别比喷施清水对照增产14.69%、9.83%、15.92%,以施用磷酸二氢钾效果最好,值得大面积推广。 相似文献
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通过对旱地龙、奥普尔在冬小麦上进行的试验研究结果表明，旱地龙、奥普尔拌种可使小麦出苗期提早1d，且苗全、苗壮，能促进小麦分蘖；拌种与拔节期喷施，可使成穗数较清水对照增加7．9％－14．2％。旱地龙拌种较清水对照增产12．7％，喷施较清水对照增产7．8％；奥普尔拌种较清水对照增产10．6％，喷施较清水对照增产13．2％；增产效果与磷酸二氢钾基本相同。 相似文献
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通过开展小麦花后喷施阿卡迪安海藻精效果试验,结果表明:小麦花后喷施海藻精2~3次,能增加穗粒数,提高千粒重,较喷清水增产4.86%~11.93%,喷225g/hm~2以上比磷酸二氢钾增产4%~5%。 相似文献
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新型植物生长调节剂在陇东旱地农作物上的应用 总被引：1，自引：0，他引：1
在干旱的1998－2000年度内，应用“抗旱宝”、“增产宝”和“天达2116”对小麦和玉米进行叶喷和浸种试验示范。结果表明，“增产宝”的抗旱增产效果最显著，平均增产12.38%－25.49%，“天达2116”和“抗旱宝”次之，分别增产13．80％－17．28％和－3．41％（减产不显著）－13．58％。试验表明，叶喷浓度以1：500－600倍液，浸种浓度以1：200－300倍液较好。 相似文献
6.
青海省脑山地区气候晾爽湿润，土壤肥沃疏松，适于莴笋地膜栽培，在莴笋定植缓苗后第一次，团稞期第二次用磷酸二氢钾300倍液＋尿素300倍液，稀土1500倍液，奥普尔500倍液，复绿灵300倍液，磷酸二氢钾300倍液进行叶面追肥，试验表明：以上5种叶面肥均可显著地增加莴笋茎粗，产量与对照均有显著差异，其中以磷酸二氢钾＋尿素，稀土和奥普尔增产效果最佳。 相似文献
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为了进一步研究SOD液肥对小麦生长发育和产量构成因素的影响,试验利用不同浓度SOD液肥在小麦拔节期对其进行叶面喷施试验,稀释浓度分别为100、300、500倍液,以喷施等量清水作对照.结果显示:①喷施SOD液肥能促进小麦光合作用及干物质积累,达到增产效果;②在拔节期叶面喷施3种不同浓度的SOD液肥有不同的肥效,处理2比对照增产19.55％,处理1比对照增产13.13％,处理3比对照增产6.28％.表明叶面喷施SOD液肥是一项简单易行、回报率相对较高的增产措施,在小麦高产高效栽培方面属一项实用技术,有较高的推广应用价值. 相似文献
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夏播青毛豆施用叶面肥和植物生长调节剂的增产试验表明,用叶面肥磷酸二氢钾1 000倍液喷施、500倍液灌根,用植物生长剂通丰500倍液喷施叶面,增产率分别为15.58%、11.11%、12.39%,均有显著增产效果;而用叶面肥叶面宝500倍液喷施,增产率为3.48%,增产效果不显著。 相似文献
10.
为了进一步研究SOD液肥对小麦生长发育和产量构成因素的影响,试验利用不同浓度SOD液肥在小麦拔节期对其进行叶面喷施试验,稀释浓度分别为100、300、500倍液,以喷施等量清水作对照。结果显示,①喷施SOD液肥能促进小麦光合作用及干物质积累,达到增产效果;②在拔节期叶面喷施3种不同浓度的SOD液肥有不同的肥效,处理2比对照增产19.55%,处理1比对照增产13.13%,处理3比对照增产6.28%。表明叶面喷施SOD液肥是一 相似文献
11.
地市级农业科学院(所)近年来,进行了一系列的科技体制改革,文章在论述以往改革的做法和成效的基础上,找出了改革中存在的几个影响发展的瓶颈问题,并进一步提出解决问题的对策。 相似文献
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Taubes G 《Science (New York, N.Y.)》1993,259(5099):1246-1248
13.
Transformation by v-sis occurs by an internal autoactivation mechanism 总被引：29，自引：0，他引：29
Transformation by the v-sis oncogene appears to require an interaction of its protein product, p28v-sis, with the receptor for the platelet-derived growth factor (PDGF). However, this interaction may not occur at the cell surface as predicted by the autocrine hypothesis because phenotypic transformation was not reversed by incubation of SSV-NRK cells with antisera to PDGF and because morphological transformation did not occur when nontransformed NRK cells were cultured continuously with p28v-sis. A mutant of the wild-type v-sis gene was constructed that encodes a v-sis protein targeted for retention within the endoplasmic reticulum and Golgi. NRK cells expressing the mutant v-sis gene did not secrete any detectable v-sis protein but were as fully transformed as wild-type v-sis transfectants. The results support a mechanism of transformation by v-sis in which internal activation of the PDGF receptor occurs before expression of either p28v-sis or the PDGF receptor at the cell surface. 相似文献
14.
Hemagglutination by extract of fava bean was inhibited by 5-percent d-glucose, d-fructose, or maltose, but not by 5-percent d-galactose or lactose. Failure to inhibit seems to reflect the presence of a hydroxyl group at the carbon No. 4 position. Hemagglutination was enhanced by dextran of high molecular weight, but not by dextran of low molecular weight. The finding supports the hypothesis that large molecular size explains the enhancement by gum acacia of hemagglutination by fava bean. 相似文献
15.
In the presence of Sendai virus inactivated with ultraviolet light, nucleated chick erythrocytes can be fused with several types of human cells to form heterokaryons. Although chick erythrocytes alone cannot be stimulated by Sendai virus to produce interferon, fusion with a human cell (AH-1) which itself may produce human interferon results in heterokaryons in which the erythrocyte genome is activated and chick interferon is produced. When nucleated chick erythrocytes are fused with another type of human cell (HeLa clone S-3) which does not produce human interferon when stimulated, no chick interferon is detectable, despite morphologic changes suggestive of activation of the erythrocyte nuclei. 相似文献
16.
Humans, but no other animal, make meaningful use of spoken language. What is unclear, however, is whether this capacity depends on a unique constellation of perceptual and neurobiological mechanisms or whether a subset of such mechanisms is shared with other organisms. To explore this problem, parallel experiments were conducted on human newborns and cotton-top tamarin monkeys to assess their ability to discriminate unfamiliar languages. A habituation-dishabituation procedure was used to show that human newborns and tamarins can discriminate sentences from Dutch and Japanese but not if the sentences are played backward. Moreover, the cues for discrimination are not present in backward speech. This suggests that the human newborns' tuning to certain properties of speech relies on general processes of the primate auditory system. 相似文献
17.
Pulse radiolysis of dilute solutions of triphenylcarbinol in saturated hydrocarbon gives spectra of the triphenylmethyl free radical, (C(6)H(5))(3)C., and cation, (C(6)H(5))(5)C(+). The yield of the ion is independent of the carbinol concentration, and is thought to measure the yield of free ions generated in the solvent. The relative yields of ions thus found in cyclohexane and 2,2,4-trimethylpentane agree with measurements made by the clearing-field method. 相似文献
18.
We observe that a nanostructured metal can be hardened by annealing and softened when subsequently deformed, which is in contrast to the typical behavior of a metal. Microstructural investigation points to an effect of the structural scale on fundamental mechanisms of dislocation-dislocation and dislocation-interface reactions, such that heat treatment reduces the generation and interaction of dislocations, leading to an increase in strength and a reduction in ductility. A subsequent deformation step may restore the dislocation structure and facilitate the yielding process when the metal is stressed. As a consequence, the strength decreases and the ductility increases. These observations suggest that for materials such as the nanostructured aluminum studied here, deformation should be used as an optimizing procedure instead of annealing. 相似文献
19.
依法治校与以德治校的思考 总被引：2，自引：0，他引：2
王韧农 《金陵科技学院学报》2004,20(2):104-107
依法治校与以德治校是学校管理科学化、规范化的必须和标志。文章以实际工作中存在的一些问题为背景，就如何坚持依法治校与以德治校提出处理好若干关系的建议，指出依法治校是学校管理的保障和前提，以德治校是学校发展的灵魂和动力。 相似文献
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