共查询到20条相似文献，搜索用时 484 毫秒
1.
控释肥对“红富士”苹果生长发育的影响 总被引：1，自引：0，他引：1
研究了控释肥对"红富士"果园土壤有机质和pH、叶片矿质元素、叶绿素含量、新梢生长量和果实品质的影响。结果表明:施肥降低了果园土壤的pH和有机质含量,施用控释肥果园的pH要高于普通复合肥,不同控释肥处理对土壤pH的影响有一定的差异;控释肥提高了叶片N、P和K的含量,不同控释肥处理之间N和K差异较为明显;相同含量控释肥提高了苹果叶片中Ca、Mg和Fe的含量,降低了Cu、Mn和Zn的含量;控释肥处理明显提高了叶片叶绿素含量和增加了新梢生长量;控释肥提高了果实硬度、果实可溶性固形物、可溶性糖和维生素C含量,降低了果实单果重和可滴定酸含量,对果形指数的影响不明显。 相似文献
2.
控释肥对菇渣基质电导率及容器苗生长的影响 总被引：4，自引：1，他引：3
通过木槿容器苗栽培试验,研究了控释肥、控释肥+少量普通复合肥(BB肥)、普通复合肥、营养液对菇渣基质电导率及木槿苗叶片数、枝条长度、最大叶面积、叶绿素含量、植株鲜重等生长指标的影响。结果表明:普通肥料处理前期菇渣基质电导率过高,后期电导率偏低,木槿容器苗生长不理想;控释肥处理前期菇渣基质EC值稍低,但后期木槿各项生长指标与营养液处理相当;控释肥加入少量普通复合肥制成的BB肥,养分释放与木槿容器苗的养分需求基本一致,木槿生长总体优于其他施肥处理。控释肥施肥方法简单,效果理想,是基质容器育苗值得推广的一种施肥方法。 相似文献
3.
《山西果树》2020,(5)
为研究不同配方施肥对果树品质的影响,选用全肥、无氮、无磷、无钾进行施肥,分别对叶片、果实中N、P、K的含量、单果重、叶绿素、花青苷、硬度、可溶性固形物含量、可滴定酸含量等指标进行分析。结果表明,全肥叶片、果实中N、P、K的含量、单果重、花青苷、硬度、可溶性固形物含量、可滴定酸含量最高,分别为27.19 g/kg、3.15 g/kg、18.72 g/kg、5.57 g/kg、3.24 g/kg、8.67 g/kg、273.8 g、45.2 mg·g~(-1)、10.8 kg/cm~2、17.4%、0.45%,N、P、K配合施用能够明显提高果实产量和品质,从叶片和果实中N、P、K的含量来看,建议生产中选择2:1:2的复合肥进行使用。 相似文献
4.
5.
施肥量对不同西梅品种产量的影响 总被引：1，自引：0，他引：1
为探讨复合肥对西梅增产的影响,在大田栽培条件下,以5个不同西梅品种为试材,研究不同复合肥用量(0、100、200、300、400g/株)对不同西梅品种产量的影响。结果表明:施肥均不同程度影响各西梅品种单果重和产量,均随施肥量的增加呈先增加后降低趋势。与对照相比,用量为300g/株复合肥可显著提高不同西梅品种的单果重和产量,并且经济效益最高。因此,不同西梅品种以施300g/株复合肥为宜,从经济效益可以看出,"法兰西"、"兰密"、"新紫兰"的经济效益十分突出。 相似文献
6.
以12年生鲁北冬枣和40年生金丝小枣为试材,分别在常规施肥基础上进行增施微生物肥的效果试验,均设增施喷叶型微生物肥处理,于花前、花后、坐果期、幼果期和果实膨大期5次喷叶400～500倍液;灌根型微生物肥处理,于发芽前灌根1次,每666.7 m2施3 L,稀释300倍液。结果表明,2个处理对鲁北冬枣比常规施肥的产量显著增加,喷叶型肥处理在提高百叶重、单果重方面的效果显著优于灌根型肥处理,而在果实硬度方面却显著低于灌根型肥处理;2个处理对金丝小枣比常规施肥的单果重、产量明显提升,成熟期延后7～10 d,喷叶型肥处理在提升果枝比、单果重、可溶性固形物含量、单株产量方面的效果显著优于灌根型肥处理,但可溶性固形物含量有所降低。增施微生物肥后2个品种枣都比各自的常规施肥显著增加经济收入,投入产出比差异不大。 相似文献
7.
为研究控释肥对香蕉生产的影响,以桂蕉6号为材料,在广西南宁香蕉产区进行控释肥、常规肥比较试验。结果显示:在等价原则下,使用控释肥和常规肥蕉树最终株高分别为278.1 cm和286.5 cm,茎基围分别为79.1 cm和82.3 cm,差异均不显著;使用控释肥和常规肥在相同调查时间内抽蕾率分别为90.99%和91.26%,折合667m2产量分别为3692.92 kg和3760.68 kg,差异不显著;使用控释肥和常规肥香蕉果实果指长、穗长、穗粗等农艺性状差异不显著,其果实可溶性固形物分别为9.02%和9.13%,可溶性糖含量分别为16.58%和16.41%,总酸含量分别为3.11 g/kg和3.02g/kg,维生素C含量分别为9.42 mg/100g和9.51 mg/100 g,差异均不显著,但是,使用控释肥所需要的施肥次数和人工较施用常规肥少,从而减少劳动力的投入,降低生产成本,提高经济效益。 相似文献
8.
不同用量控释氮肥在葡萄生产上的施用效果 总被引：1，自引：0，他引：1
以速效氮肥分次施用的习惯施肥方式为对照,设置不同用量的包膜尿素和等量普通尿素一次性施用处理,研究不同用量控释氮肥对葡萄生育性状、产量和可溶性糖的影响。结果表明:施用控释肥对葡萄穗重、穗粒数、粒重等指标有一定影响,与习惯施肥处理相比,葡萄的可溶性糖有了明显提高。从产量结果看,施用一定量控释氮肥和速效氮肥一次性施用,与习惯施肥产量持平或显著提高,同时减少了氮素养分投入量和施用次数。综合来看,在当地试验条件下,以每667m2施氮24kg,其中控释氮14kg,速效氮10kg,做基肥一次施用的方式效果最好。 相似文献
9.
控释尿素与尿素配施对杭白菊产量和氮肥利用率的影响 总被引：2，自引：0，他引：2
在大田栽培适量施肥和减量施肥条件下研究施用尿素、尿素与控释尿素配施对杭白菊
（Chrysanthemum morifolium）产量和氮素利用率的影响。设6 个处理：对照不施氮肥（CK11）;适量施肥
氮肥为尿素（N11）、适量施肥氮肥为尿素与控释尿素配施（N12）;减量施肥氮磷钾施用量均减少1/4,对
照不施氮肥（CK22）,减量施肥为尿素（N21）,减量施肥尿素与控释尿素配施减量施肥（N22）。结果表明,
与对照相比,施氮处理提高了株花序数、花序直径和单花序质重。采收期,施肥量相同时,控释尿素与
尿素配施茎叶部氮素分配比例低于单施尿素处理,花部高于单施尿素处理,表明控释尿素与尿素配施有
利于氮素向花序分配,提高产量。适量施肥杭白菊产量高于减量施肥。适量施肥控释尿素与尿素配施比
单施尿素增产87.96 kg · hm-2,比减量施肥控释尿素与尿素配施增产124.99 kg · hm-2。施用方式相同时,
适量施肥氮肥利用率高于减量施肥,氮肥农学利用率低于减量施肥。施肥量相同时,控释尿素与尿素配
施氮肥利用率、氮肥农学利用率高于单施尿素。在本试验条件下,施氮量120 kg · hm-2,控释尿素（150 d）
与尿素按1︰1 混合,基施用量占总施氮量50%,控释尿素（90 d）与尿素按1︰1 混合,8 月15 日追施孕
蕾肥,施用量占总氮量50%,效果最佳。 相似文献
10.
作者以辽宁省果树科学研究所已选育和引进的极早熟杏品种‘骆驼黄’、仁用杏新品种‘国仁’和‘丰仁’为试材,通过连续3年(2014—2016年)的田间定位试验,研究杏专用肥施用时期及施用量对杏产量及品质的影响。研究结果表明,随着杏树专用肥施用量的增加,‘骆驼黄’杏的单果重和产量逐渐增加,以株施2.25 kg处理的产量最高,株施2.00 kg处理的单果重最高;维生素C含量以株施2.0 kg处理的最高。‘丰仁’杏春、秋2次施肥(春1/3、秋2/3)叶片营养及果仁产量和质量指标明显高于春季、夏季和秋季1次施肥处理的。综合比较各项产量和质量指标,认为株施杏专用肥2.0~2.25 kg为最佳施用量,春、秋2次施肥为最适施用时期。 相似文献
11.
The effects of combinations of salinity (no salt, 2000 p.p.m. or 4000 p.p.m. of CaCl2 and NaCl, 1:1) and water table (30 cm, 60 cm or 90 cm from the soil surface), on the vegetative growth and tolerance of ‘Golden Japanese’ plum and ‘Mit Ghamre’ and ‘Balady’ peaches were studied. The plants were grown in lysimeters. The growth of the trunk, total shoot length, the increase in shoot length per cm and the fresh weight of top, root and total plant were reduced with increasing salinity of the irrigation water. The effect was accentuated when the plants were maintained at high water table level. The salinity treatments resulted in the death of 43%, 73% and 76% of the plants in the plum, and the ‘Mit Ghamre’ and ‘Balady’ peaches, respectively, indicating that the plum is more tolerant to salinity than the peach. The plants of the salinity treatments showed various symptoms of salt injury, such as leaf burn, defoliation, shoot die-back and finally death. In the peaches, salt injury started to occur in the first growing-season, whereas the salt injury appeared in the plum in the second growing-season. The symptoms were more pronounced in the 4000 p.p.m. treatment than in the 2000 p.p.m. treatment and were more pronounced at the high water table level. The salinity level was the predominant factor and the effect of the water table on the vegetative growth diminished with increase in the salinity level of the irrigation water. 相似文献
12.
13.
AIM：To establish a fast, accurate and economical technique for culturing mouse pulmonary arteriolar smooth muscle cells (PASMCs), and to explore the effects of hypoxia on the proliferation and apoptosis of the PASMCs. METHODS：In sterile condition, the pulmonary artery was isolated from the male BALB/c mice by digesting with collagenase I, and the cells were cultured in fetal bovine serum-coated flask. Centrifugal procedure was not used during the cell passage. The cell morphology was observed under an inverted phase-contrast microscope. α-Smooth muscle actin was identified by immunocytochemistry and immunofluorescence. The effects of hypoxia on the proliferation and apoptosis of the PASMCs were detected by CCK-8 assay and TUNEL assay. RESULTS：PASMCs were identified by the methods of immunocytochemistry, immunofluorescence staining and observation of morphology. Unlike the rat PASMCs with typical subcultured peak-vally pattern, the mouse PASMCs showed a lot different without a peak-vally pattern. The cells could be subcultured after 5 d to 7 d and there was 3 to 5 generations depending on the activity of the cells. CCK-8 assay demonstrated that the A values of PASMCs exposed to hypoxia increased after 24 h (P＜0.05) as compared with normoxia. TUNEL result showed that the apoptotic index of the PASMCs in hypoxia decreased after 24 h (P<0.05). CONCLUSION：This technique for obtaining cultured mouse PASMCs is simple, fast, accurate and economical. The digestion time is easy to control. Hypoxia promotes the proliferation and inhibits the apoptosis of PASMCs. 相似文献
14.
小檗碱和壳聚糖抗蔬菜病原真菌活性测定及复合膜制备 总被引：2，自引：0，他引：2
研究了小檗碱和壳聚糖对几种常见蔬菜病原真菌的抑制活性,以及以小檗碱和壳聚糖为主料制备复合膜的方法,并测定了该膜的药物释放效果。试验表明:低浓度(0.234 mg/mL)小檗碱即可抑制辣椒炭疽病菌(Vermicularia capsici)等5种蔬菜病原真菌的生长。20 mg/mL浓度壳聚糖对番茄灰霉病菌(Botrytis cinerea)的抑制率高达65%,而对其余4种果蔬病原真菌也有一定的抑制作用。为了集成这2种天然化合物的优点,制备了小檗碱-壳聚糖复合膜,该膜具有缓释功能,在模拟外部环境(磷酸缓冲液,pH 6.8)条件下,20 d小檗碱累计释放率接近25%,提示其在果蔬贮藏抗菌中的应用价值。 相似文献
15.
钾肥在小白菜和萝卜上的施用效果 总被引：6，自引：0，他引：6
采用盆栽试验方法研究了施用钾肥对小白菜、萝卜生长发育、产量、品质及钾素含量的影响。结果表明 ,施用钾肥对小白菜和水萝卜的株高、叶片数无显著的影响 ,但可提高水萝卜块根的产量 ,提高幅度为 31.0 4 %～ 97.93%。施用钾肥可提高小白菜和萝卜的蛋白质和VC含量 ,降低硝酸盐含量 ,增加植株的钾素含量 相似文献
16.
17.
18.
19.
Fresh onion seeds desiccated to 6.0% seed moisture content (SMC) were stored in various packaging materials under different storage conditions. Seeds packed in aluminum-laminated pouches beside those stored with silica gel at 25 °C maintained satisfactory germinability and vigour after 12 months. Desiccated seeds stored in moisture impervious containers produced more vigourous seedlings. Germination potential of onion seeds increased with reduced SMC besides storage in moisture impervious packets along with desiccants as physiological and biochemical attributes are regulated. Seed viability and vigour decreased with accelerated ageing due to increased lipid peroxidation, decreased activities of several free radical and peroxide scavenging enzymes. Electrical conductance of seed leachates also increased with ageing. Thus, adoption of appropriate storage temperature and moisture control techniques would significantly affect onion seed quality, which was due to minimum accumulation of free peroxide radicals and enhanced activity of free radical scavenging enzymes. 相似文献