共查询到16条相似文献,搜索用时 93 毫秒
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1 棉田多熟制的主要优势80年代以来,随着农村商品经济的发展,我省传统的粮(草)棉间套制,经济效益偏低,已成为突出问题,因而,1985年以后,伴随农村种植结构的全面调整,我省棉田种植结构逐步进行了两个方面的改革:一是棉田秋冬季由原来春粮、绿肥间作改为春粮、蔬菜类间作;二是棉田春夏季将原来纯 相似文献
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徐洲棉区棉田多熟种植的现状及发展策略徐家安(徐州市农科所221121)冯兴振(徐州市农业局221003)沙春晓,李修喜(铜山肥农业局221009)九十年代以来,市场经济不断地向纵深发展,农村的产业结构发生了深刻的变化,市场需要的多元化,进一步推动了种... 相似文献
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我国长江流域发展粮豆多熟制是一项增产、改土的有效策略江苏省农科院经作所沈克琴,顾和平江苏丘陵地区镇江农科所范海若四川省重庆市土肥站胡王仲四川省乐山市农科所陈桂荣一、粮豆多熟制形成的原因生产上存在的问题、各作物的轮作地位、人民生活和市场经济发展的需要以... 相似文献
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发展优势大豆多熟制模式,是旱地耕制改革的重要内容一,经过两年实践,引进筛选出春、夏、秋三季配套种植的优势大豆品种,总结了一套高产栽培技术,摸索出以“麦-豆-苕”为主体的一套多熟制栽培模式,充分利用了自然资源,培肥了地力,增加了土地产出和农民收入,实现了优势高产、高效。 相似文献
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小麦,玉变多元多熟制高产栽培技术 总被引:1,自引:0,他引:1
小麦、玉米套作完成一年内种植收获三季多元多熟新型耕作制度。以小麦幅留行,套种地膜春玉米,麦子收获后种植夏玉米。春夏玉米共生期在10 ̄15天,达到优化麦,玉复合配置。安全收获,实现高产高效栽培。 相似文献
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丰城市是江西省的一个产粮大市 ,粮食作物播种面积15万hm2,其中稻田面积占80%。前几年 ,由于我市粮食产量相对过剩 ,加上粮质偏差 ,造成外销受阻 ,粮食大量积压 ,农民卖粮难 ,种粮效益低。为了扭转这种局面 ,市委、市政府以早籼稻谷退出国家收购保护价为契机 ,审时度势 ,狠抓种植业结构调整 ,引导全市农民拿出6700hm2 稻田进行改制 ,即改传统的“1+2”稻田三季耕作制 (一年种一季直播白菜型油菜和两季水稻 )为“1+1”稻田两季耕作制 (一年种一季甘兰型油菜和一季超级稻 ) ,取得了“1+1>1+2”的显著效益。一、增效节… 相似文献
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陆地棉新品系农艺性状的配合力及杂种优势研究 总被引:1,自引:0,他引:1
研究了自育的几个陆地棉新品系的一般配合力效应及组配杂种优势的潜力。结果表明,研究的几个陆地棉新品系中,以品系99-54、99-20、96-7的一般配合力较高.所配组合的杂种竞争优势籽、皮棉产量分别达到16.21%、12.18%和11.38%、7.68%.而品系98-19和00-99一般配合力较差。在亲本选择和杂种优势利用中,应用99-54、99-20、96-7较其它四个品系k4、k6、98-19、00-99为优。 相似文献
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选取闽江河口区稻田为研究区域,对土壤和植物的C、N、P含量及其生态化学计量比进行测定和分析。研究表明:土壤C、N、P元素的变化范围分别为5.72-13.41、0.47-0.82和0.33-0.89 mg.g-1,平均值分别为9.50、0.62和0.56 mg.g-1,其C与N、C与P、N与P的比值分别为12.18-16.39、15.07-24.34和0.92-1.55,平均值分别为15.05、17.88和1.20;植物C、N、P元素的变化范围分别为28.62-38.99、0.65-1.52和0.13-0.32 mg.g-1,平均值分别为35.21、1.19、0.25 mg.g-1,其C与N、C与P、N与P的比值分别为24.54-44.10、94.05-258.93和2.13-10.55,平均值分别为32.11、160.07和5.47。土壤C、N含量低于植物,而P含量却高于植物,C与N、C与P、N与P的比值则表现为土壤低于植物。 相似文献
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The study of food products is always a challenge due to the number of components involved and the interactions that may occur between them. Water is a particular ingredient which interacts with all hydrophilic compounds, although affinities may differ for limiting water amount. During this study, results obtained using 1H NMR on cake dough were compared in terms of the effects of flour type (soft or medium hard), the addition of gluten (5%–20%) and the use of soft flour fractions (flour particle fractions smaller or larger than 50 μm). T2 values and the signal intensities of different proton populations were studied as a function of the wheat protein contents of dough samples. Physicochemical characterization methods were used to better understand how the origin and particle size of flour might impact the hydration properties and mobility of a model system. Increasing the protein content in dough samples was related to an increase of the mobility of fat protons and of the least mobile proton population (relaxation times ranging from 175 to 180 ms and from 5 to 7 ms, respectively). 相似文献
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The commercial mycopesticide, Vertalec® based on Lecanicillium longisporum, was evaluated for simultaneous control of aphids and powdery mildew on cucumbers in a greenhouse setting where temperature and RH were allowed to fluctuate within normal operating ranges. Five to six week old cucumber plants were inoculated with either Sphaerotheca fuliginea (Sf) spores, cotton aphids (Aphis gossypii) or both. Vertalec, Vertalec containing irradiation-inactivated blastospores (II Vertalec) or sterilized water (control) were applied to the plants 1, 4, and 7 days later. Vertalec treatment provided complete control of aphids 16 days after aphid inoculation, whereas effects of the II Vetalec were not significantly different from the water-treated control. The number of powdery mildew spots on cucumber leaves and the number of S. fuliginea spores in each spot were significantly lower in Vertalec-treated plants than II Vertalec-treated plants or the controls, whereas numbers in the II Vertalec treatment were lower that the untreated control. These results demonstrate that Vertalec has potential for simultaneous management of both cotton aphid and powdery mildew in greenhouse cucumber production. 相似文献