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大棚莲藕高产栽培技术 总被引:1,自引:0,他引:1
该文从大棚的搭建、藕种的选择、整地及施肥、适时定植、藕田管理、病虫害防治、适时收获等方面介绍了大棚莲藕高产栽培技术,以期为农民创收致富提供参考。 相似文献
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一、大棚早熟莲藕1.排藕设施栽培莲藕应选用早熟浅水藕品种,如鄂莲系列、飘花藕等。一般在2月下旬至3月上旬定植,6月中下旬采收。每亩施充分腐熟有机肥3000~5000公斤、过磷酸钙25~40公斤作基肥,整地并灌水深3~6厘米,栽藕前1~2天再耕耙1次。为了方便排藕,田水宜浅,保持2~3厘米即可。将藕头朝下斜插入泥中,后把节稍翘在水面上,种藕与地面呈30度角。大小种藕分级分畦或分田栽插,每畦排藕2行,呈品字形均匀分布。藕向与畦面平行,畦面行与行间距1米,藕与藕 相似文献
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藕、鱼立体种养是极具开发潜力和较高经济效益的种养模式。大棚栽植可使藕的成熟期提早2个月,产量增加20%~30%,经济效益提高2~3倍;藕池养鱼可增加生长期3个月,能较好地控制上市规格和上市时间,综合经济效益十分可观。 相似文献
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大棚池藕、鱼、瓜菜立体种养是极具开发潜力的高效种植模式。利用大棚栽藕,可使藕的成熟期提前2个月,产量增加20%~30%,经济效益提高2~3倍。藕池养鱼,鱼的生长期增加了3个月,再加上种植瓜菜,因而综合效益较高。 相似文献
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利用大棚进行早春栽培的莲藕,可在6月上中旬收获上市,价格高,销路好,一般每667平方米产青荷藕1200公斤左右,产值4000元上下. 相似文献
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<正> 利用大棚进行早春栽培的莲藕,可在6月上中旬收获上市,价格高,销路好,一般每亩产青荷藕1200公斤左右,产值4000元上下。 (一)选择地块,施足底肥 选择 相似文献
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为了提高枣园栽培饲草的越冬率,在枣园分别采用薄膜覆盖、玉米秸秆覆盖和增施钾肥的措施,对多变小冠花、百脉根和白三叶的越冬率和冬前根部的碳水化合物含量进行了分析。结果表明,薄膜覆盖和玉米秸秆覆盖均能够极显著提高3种饲草的越冬率(P0.01),薄膜覆盖的效应极显著高于玉米秸秆覆盖(P0.01),施用钾肥对饲草的越冬没有显著的效应。多变小冠花、百脉根和白三叶3种饲草根部可溶性总糖含量与饲草的抗寒性呈正相关关系,而与淀粉含量呈负相关关系。 相似文献
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[目的]为莲藕产品的开发、工艺制定和品质控制提供理论依据。[方法]从特定品种的莲藕中分离纯化出莲藕淀粉,研究莲藕淀粉及其级分的颗粒特性。[结果]莲藕淀粉成分含量为:水分14.17%、灰分0.95%、粗蛋白0.34%、粗脂肪0.28%、总磷14.50 mg/100 g、直链淀粉24.76%。莲藕淀粉有圆形和椭圆形颗粒,其粒径分别为14.30、61.48μm。天然莲藕淀粉的晶体结构为B型,直链淀粉为V型,支链淀粉无明显晶体结构。天然淀粉及其级分的晶体崩解温度与起始玻璃化温度均较接近,但晶体崩解所需热量差别较大。莲藕淀粉的糊化温度为65.8~73.8℃。淀粉溶解度和膨胀度随温度的升高而增大。[结论]莲藕淀粉在95℃的膨胀度为24.497,属于中等膨胀型淀粉。 相似文献
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Tirichine L Sandal N Madsen LH Radutoiu S Albrektsen AS Sato S Asamizu E Tabata S Stougaard J 《Science (New York, N.Y.)》2007,315(5808):104-107
Legume root nodules originate from differentiated cortical cells that reenter the cell cycle and form organ primordia. We show that perception of the phytohormone cytokinin is a key element in this switch. Mutation of a Lotus japonicus cytokinin receptor gene leads to spontaneous development of root nodules in the absence of rhizobia or rhizobial signal molecules. The mutant histidine kinase receptor has cytokinin-independent activity and activates an Escherichia coli two-component phosphorelay system in vivo. Mutant analysis shows that cytokinin signaling is required for cell divisions that initiate nodule development and defines an autoregulated process where cytokinin induction of nodule stem cells is controlled by shoots. 相似文献
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LIU Guo-dong James Dunlop Thai Phung 《中国农业科学(英文版)》2006,5(5):370-376
A system to control the release of phosphate in water was successfully established, based on solubility product of [Ca^2+] and [PO4^3-] using tricalcium phosphate as P source in the hydroponic solution, and adding CaCl2 for supplementing extra Ca^2+. The system, similar to soil solutions, was a P nutrient buffer solution with very low bioavailable P. The buffer solution induced the roots of both monocotyledon and dicotyledon species to grow abundant root hairs, 3 mm in maximum length. The monocotyledons were corn (Zea mays L.) (var. Yellow Rose), wheat (Triticum aestivum L.) (var. Yanzhong 144), Triticale secale L. (vat. Jingsong 5), and ryegrass (Lolium rigidum L.) (var. Ruanni), and the dicotyledons were Arabidopsis thaliana L. (var. Columbia), white clover (Trifolium repens) (var. Kopu), Lotus (Lotus peduncucatus Cav. Luliginosus Schkuhr) (var. Grasslands Maku). For these species we proved that the root environment controls the induction of root hair formation. However, the hydroponic buffer solution failed to induce root hairs on the roots of onion (Allium cepa L.). Other investigators have concluded that corn does not form root hairs in hydroponics, but abundant long root hairs on corn were induced by this buffer system. The roots with abundant long root hairs are called "hedgehog roots" because they have hairs everywhere just like a hedgehog. 相似文献
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Rhizobium spp. show chemotaxis to plant root exudates. A glycoprotein has been isolated from the root exudates of birdsfoot trefoil, Lotus corniculatus, which, at micromolar concentrations, attracts six strains of rhizobia. This glycoprotein has been given the trivial name trefoil chemotactin and contains approximately twice as much protein as carbohydrate. Gel filtration of trefoil chemotactin on a Bio-Gel A-1.5m column gave a molecular weight of approximately 60,000. Trefoil chemotactin represents a new class of chemoattractants for bacteria. 相似文献
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[目的]研究不同浓度营养液对温室黄瓜根系整个生长周期的鲜、干质量影响,为温室作物合理施肥提供参考依据。[方法]以袋装珍珠岩为营养液载体,营养液采用霍格兰(Hoagland)配方,设置营养液稀释倍数1∶200、1∶100、1∶50、1∶30共4个处理,研究不同处理对黄瓜光合特性和根系质量的影响。[结果]营养液稀释倍数1∶50处理中黄瓜光合特性和根系鲜、干质量显著高于其他处理,而且该处理中黄瓜不受养分胁迫的影响。[结论]营养液稀释倍数1∶50为温室黄瓜无土栽培的最优处理浓度。 相似文献
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为改善工场化大棚集中漂浮育苗在长期低温阴雨天气时棚内湿度偏大,烟苗螺旋根易生,根系不发达,苗弱易发病等现状。本研究对现有育苗大棚改装“环境调节系统”,分析自动主动排湿设备在烤烟育苗中的应用效果,为改良烟苗培育设施设备条件提供参考。结果表明:改装了“环境调节系统”的育苗大棚对烟苗的影响,在累计光照时长和气温较低的天气效果明显,可加快烟苗出叶速度,缩短苗床期5d;同时显著增加烟苗的茎围和促进烟苗根系发育及干物质积累,提高烟苗素质;且每个育苗大棚可降低温湿度管理成本479元。有利于减工降本、提质增效。 相似文献