共查询到20条相似文献，搜索用时 296 毫秒
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介绍临泉县大葱生产形势,总结大葱生长过程中主要病虫害的发生种类、危害程度、发生规律、防治策略,以及用药时应注意的事项,以为大葱病虫害的防治提供参考。 相似文献
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葱须鳞蛾发生规律及防治技术 总被引：1，自引：0，他引：1
在四川郫县等露地韭菜(黄)产区,近年出现了一种发生比较普遍、严重为害韭菜叶片的害虫,农民误认为是"韭蛆"。经过笔者实地调查之后,首次将其诊断为葱须鳞蛾。葱须鳞蛾与韭蛆的区别是:葱须鳞蛾属鳞翅目菜蛾科葱小蛾,以幼虫啃食危害韭菜叶片;韭蛆,即迟眼蕈蚊的幼虫,属双翅目害虫,以幼虫钻蛀危害韭菜根及假茎。葱须鳞蛾在我省有较大发生面积,韭菜受该虫危害后,一般都会造成比较严重的产量和品质损失,在严重发生的田块,若防治不及时,可造成全田叶片几乎全部从基部断裂、腐烂。2012年3月下旬,笔者在 相似文献
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控释肥对大葱生长及品质的影响 总被引：2，自引：1，他引：2
以大葱为试材,采用"金正大公司"生产的控释掺混肥(21-6-15)进行栽培试验,并与普通复合肥进行肥效对比.分析不同施肥处理对大葱株高、茎粗、叶绿素含量、可溶性糖含量等指标的影响,探讨控释肥在大葱生产上应用的可行性及最佳施肥量.结果表明:控释肥养分的释放能满足大葱整个生长期对养分的吸收需求,与同量养分的普通复合肥相比,控释肥可以改善大葱的品质、提高其产量,单位面积增产率可达57%左右.从经济效益、大葱产量、品质及肥料利用率等方面综合考虑,100 g/m2的控释肥用量为最佳用量. 相似文献
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大葱和洋葱种间杂种的获得及其特性 总被引：1，自引：0，他引：1
【目的】构建大葱和洋葱的种间杂种。【方法】以章丘大葱和洋葱自交系06-38为材料,进行远缘杂交,对杂种子房进行培养;利用CAPS技术对所获得植株进行鉴定;利用花粉染色法、离体萌发法和自交对其进行育性鉴定。【结果】大葱和洋葱正反交,自然状态下胚败育。在未添加激素的MS培养基上进行大葱与洋葱种间正反交后的子房培养,均获得种间杂种F1,授粉后第7天为最佳培养时期;通过子房培养分别获得了大葱×洋葱、洋葱×大葱杂种植株26株和22株;经CAPS检测,杂交后代全部为真杂种。F1杂种植株具有明显的杂种优势,杂种雄性不育。【结论】利用子房培养技术,克服了大葱和洋葱远缘杂种在自然状态下胚败育的情况发生,获得了种间杂种F1;所获得的杂种植株表现出明显的杂种优势,且雄性不育。 相似文献
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利用洋葱、大葱、大白菜残体进行种子发芽和重茬土苗期生长试验.结果表明,三种蔬菜残体浸提液对加工番茄种子萌发的影响都起到低促高抑效应,对幼苗的生长影响则不一致,大葱残体浸提液对加工番茄幼苗地上部分的生长起低促高抑效应,而对根系的生长则是低抑高促效应,大白菜和洋葱残体浸提液则对幼苗地上部分的生长起促进作用,而抑制幼苗根系的生长.在混入残体土壤中栽培试验中,通过检测加工番茄叶片POD、SOD、CAT酶活性,发现洋葱、大葱残体在5 g/kg干土浓度时对加工番茄生长最为有利,大白菜残体所有处理则都降低加工番茄抗逆性,不利于加工番茄的生长. 相似文献
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Cytoplasmic male sterility exists widely in most natural populations of welsh onion （Alliumfistulosum L.）, which makes it possible to breed out many male sterile lines for heterosis utilization. Unfortunately, the breeding of cytoplasmic male sterility in welsh onion has a little progress due to the limitation of its biological characteristic and traditional selection approach. To study the feasibility and the efficiency of utilizing marker assisted selection for male sterile lines in welsh onion, one SCAR marker, SCS13, and one RAPD marker, S2002400, which could distinguish between N and S cytoplasm in several welsh onion cultivars, were identified. The two markers were then confirmed by Southern blotting, and used to screen the N or S cytoplasm of individual plants in seven welsh onion cultivars in this study. Male sterile and fertile plants were evaluated by aceto-carmine dying. The frequency of N-cytoplasmic plants and maintainer genotype was calculated in the seven open populations of welsh onion. The minimum number of plants needed to identify a maintainer was evaluated to be 95% reliable. Results showed that 20 to 80% decrease of crosses and self-crosses for identifying a maintainer genotype could be achieved by the marker-assisted selection compared with traditional selection method. It was proved that the molecular markers could precisely identify cytoplasmic types individually, performed by one generation of cross and two generations of testcrosses and self-crosses. Finally, several maintainer genotype plants were selected with the help of the two markers in the seven cultivars. The screened markers could assist and accelerate sterile and maintainer lines selection with less labor and cost. 相似文献
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不同钾肥用量对大葱产量及经济效益的影响 总被引：2，自引：0，他引：2
[目的]为山东章丘大葱生产合理施肥提供科学依据。[方法]在施N 258.75 kg/hm2和P2O5258.75 kg/hm2基础上,设计4种不同钾肥用量的处理,统计不同处理的株高、茎周长、葱白长、单株重,探索钾肥不同施用量对章丘大葱产量和生产收益的影响。[结果]在氮磷基础上增施钾肥可使大葱株高增加14.3~30.5 cm,茎周长增加1~1.3 cm,葱白长增加7.2~11.8 cm(增长13.8%~22.6%),单株重增加47.7~103.8 g。各施钾处理均比不施钾处理增产,180、262.53、45 kg/hm2的施钾处理分别比对照增产11.1%、14.3%和14.5%,净增产值3 828~4 844元/hm2,其中262.5 kg/hm2处理的净增产值最高。[结论]在当地土壤养分条件下,施钾262.5 kg/hm2,增产效果最好,经济效益最佳。 相似文献
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