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如何引进适应本地区的甜瓜新品种 总被引:1,自引:0,他引:1
甜瓜在我国有着悠久的种植历史,品种类型多种多样,不同的甜瓜传统产区都有其各具特色的传统品种,但由于多年种植,造成品种退化严重,而且原来各地的甜瓜品种类型较少,已不适应市场多元化的需求,因此在传统瓜产区,不论是西北的厚皮甜瓜,还是东部的薄皮甜瓜都需要更新品种;另外随着市场经济的快速发展及保护设施的广泛使用,使得甜瓜种植格局发生了变化,原本厚皮甜瓜的种植只局限于西北干旱地区,现在在东部地区保护设施内也可种植早、中熟的厚皮甜瓜,这使得老瓜区和新瓜区都存在一个引进新品种的问题。1甜瓜品种的分类甜瓜按类型… 相似文献
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调整种植方式和茬口、优化品种结构是促进甘肃省甜瓜稳定发展的重要途径。全文从分析甜瓜生态适应性和甘肃省甜瓜主要产区的不同季节温、光条件入手,提出了优化甘肃省甜瓜种植方式、茬口和品种的意见,简要分析了种植方式和品种结构调整中应注意的几个技术问题。 相似文献
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正吐鲁番市种植甜瓜历史悠久,产品除供应本地市场还销往全国各地,深受广大消费者喜爱。种植甜瓜经济效益较好。吐鲁番地区春季升温快、日照充足,设施农业发展迅速,近年来早春设施栽培甜瓜已成为吐鲁番市设施农业的重点产业。为筛选品质佳、效益好、适合吐鲁番地区早春设施栽培的甜瓜品种,2016年春季我们开展了日光温室甜瓜品种比较试验,现将试验结果总结如下。 相似文献
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S.C. Pearce Slava Doberšek-Urbanc 《The Journal of Horticultural Science and Biotechnology》2013,88(3):295-305
Various methods are considered for the measurement of irregular and biennial phenomena.An electronic computer was used to simulate bodies of data with known (i) basic pattern, whether biennial or not, (ii) trend, i.e. tendency to increase or decrease at a steady rate, (iii) random variation. Data were simulated:(a) to test the various methods in their ability to detect a strict biennial effect in the presence of trend and random variation,(b) to determine the statistical distribution of various methods of measuring bienniality and their reaction to patterns other than strictly biennial ones, and(c) to ascertain the effect of length of period on the measures and their sensitivities.The conclusion was reached that I, the established method of measuring bienniality, and a related quantity, K, were the most useful. By way of illustration, both were used with data from an experiment with apple trees. Until more is known, there is no reason to abandon I, though K has some attractive properties. 相似文献
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研究长期大蒜连作复种秋白菜对土壤酶活性和根际土壤微生物数量的影响。采集15、25、35、45年大蒜复种秋白菜连作土壤,分别测定大蒜生育期根际土壤微生物区系和酶活性的变化并探讨二者相互作用的关系。结果表明:在整个生育期土壤酶及微生物区系的变化以25年作为分割点,土壤脲酶、多酚氧化酶、过氧化氢酶均表现为,连作25年以下,随生育期的变化呈"Z"字形,连作25年以上变化趋势为先升后降。随着种植年限增加根际土壤蔗糖酶活性下降分别为82.3%、63.6%、72.6%、53.7%;连作45年的土壤酸性磷酸酶活性下降幅度为10.9%。随着连作年限的增加,土壤中细菌和真菌的数量和比例变化表现为15年为较低值,随后表现为回升趋势,微生物三相比例趋于均一化。连作15年以上的土壤,微生物种群结构失调,表征土壤健康状况的土壤酶的活性开始下降,连作25年以上的土壤连作障碍极其显著。 相似文献
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Dorothy J. Wilson W. S. Rogers 《The Journal of Horticultural Science and Biotechnology》2013,88(1):21-26
Trials were carried out at East Mailing from 1960 to 1962 to assess the efficiences against codling moth of spray programmes comprising high- volume applications of o?2% lead arsenate. A programme of two sprays applied three weeks apart, the first application being made about ten days after larvae began to hatch, was used as a standard in each trial.The addition of a petal-fall spray to the standard programme resulted in better control, particularly of calyx entries, total damage being reduced in three trials by 76%, 85%, and 93% as compared with 65%, 63%, and 57% respectively. Three sprays applied at fortnightly intervals from the beginning of the hatching period also gave better control than the standard programme, reducing damage by 80% as compared with 56%. A programme of two sprays, the first applied at the beginning of the hatching period and the second three weeks later, appeared to give poorer control than the standard in one trial and better control in another, but the difference was not significant in either trial.The extent to which the number and timing of lead arsenate sprays is restricted by harvest residue considerations is discussed with reference to chemical data obtained during these trials. 相似文献
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西瓜连作障碍及克服措施分析 总被引:1,自引:0,他引:1
西瓜连作障碍一直是困扰瓜农的主要问题,文章总结了西瓜连作障碍的表现,如造成土壤营养失衡、西瓜生长受阻;土壤有益微生物种群下降,病原菌积累的数量增加,土传病害加重;果实产量及品质都大幅度下降。在此基础上,文章分析了西瓜连作障碍形成的原因,并针对这些原因提出了克服措施和主要解决办法,旨在改善西瓜生长过程的不利生产环境,创造有利于西瓜连续种植的生态条件,提高西瓜的产量和品质。 相似文献
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不同栽培措施对连作马铃薯土壤真菌、真菌
性病害和产量的影响 总被引:1,自引:0,他引:1
通过连续3 a 利用不同栽培措施克服马铃薯连作障碍的定位试验,结果 表明,2009~2011 年
深翻处理的耕层土 壤真菌数量与连作相比降低29.59%~51.63%,菌剂处 理降低10.41%~71.96%,微肥处
理对改善土壤真菌数量效果不明显。深翻处理的马铃薯早疫病发病率比 连作降低10.00 个百分点到35.00
个百分点,菌剂处 理降低11.67 个百分点到38.33 个百分点,微肥处 理降低11.66 个百分点到26.67 个百分点;
深翻处理的马铃薯早疫病病情指数比 连作低20.34%~75.51%,菌剂处 理降低23.83%~64.50%,微肥处 理
降低20.34%~52.26%,并且差异达到显著或极显著水平。 深翻处理的马铃薯晚疫病发病 率比连作低15.00
个百分点到37.50 个百分点,菌 剂处理降低7.50 个百分点到36.67 个百分点,微 肥处理降低15.00 个百
分点到25.83 个百分点;深翻处理的马铃薯晚疫病病情指 数比连作低57.03%~80.44%,菌 剂处理降低
24.69%~66.67%,微 肥处理降低27.12%~50.76%,并且差异达到显著或极显著水平。深翻处理的马铃薯
比连作增产21.20%~29.99%,微肥处理 比连作增产6.14%~20.49%,菌剂处理比连作增产1.29%~13.42%,
并且差异达到显著或极显著水平。 相似文献