共查询到19条相似文献,搜索用时 93 毫秒
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稻草不同覆盖厚度对甘薯产量和氮代谢的影响 总被引:1,自引:0,他引:1
研究稻草不同覆盖厚度对甘薯产量和氮代谢的影响,并探讨甘薯产量、叶片氮含量与代谢相关酶活性之间的相关性,旨在筛选出适合甘薯栽培的最佳覆盖方式,为甘薯高产栽培提供理论依据。结果表明:(1)各覆盖处理的产量高低顺序为:"草2+土">"草4+土">"草">对照;(2)相关性分析表明,各处理的甘薯产量与叶片全氮含量呈显著正相关,与硝酸还原酶(NR)活性呈极显著正相关;叶片全氮含量与可溶性蛋白含量、NR、谷氨酰胺合成酶(GS)、谷氨酸脱氢酶(GDH)活性均呈极显著正相关。综合各项指标认为,"草2+土"可用作甘薯栽培上适宜的覆盖方式,氮代谢相关指标可作为判断甘薯长势与产量高低的理论参考。 相似文献
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栽培密度对优质鲜食型甘薯农艺性状及产量的影响 总被引:3,自引:0,他引:3
为了探讨不同密度处理对优质鲜食型甘薯农艺性状和产量的影响,选用优质鲜食型甘薯品种广薯87和福薯8号开展研究。结果表明:不同密度水平对2个甘薯品种的蔓长、蔓重、单株结薯数、单株薯重及商品薯率等主要农艺性状均有重要影响,2个品种表现不一;在不同密度水平下福薯8号产量水平部分间达极显著性差异,其中以5.4万株/hm~2的栽培密度时,其产量最高达45 562.50 kg/hm~2,不同栽培密度水平下广薯87无显著性差异。2个甘薯品种需选择适宜的栽培密度进行种植才能达到高产、高效。 相似文献
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以甘蔗桂糖21号为试验品种,设置不同种植行距及配套相应的栽培管理措施,探索一套适合甘蔗高效节本的有效栽培和管理模式,为当地开展甘蔗高效节本栽培提供科学依据。结果表明,1.2m甘蔗种植行距并配套生产过程采用高效节本综合技术能较大幅度降低吨蔗成本,提高甘蔗种植效益。 相似文献
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南方甘薯优质高产无公害栽培技术 总被引:2,自引:2,他引:0
甘薯营养丰富,养分平衡,是一种具有良好保健和药用功能的作物.近年来,随着美、日、韩等国对甘薯营养品质和保健功能研究的深入,尤其是日本的研究结果证实甘薯是40多种蔬菜中最佳的防癌食物之后,不少国家己掀起一股"食用甘薯热".随着我国农业结构的调整和人民生活水平的提高,甘薯深受各大中城市居民的喜爱,已由过去作粗粮的习惯逐步转向保健食品的利用习惯,宾馆、酒楼等饮食行业也已将甘薯食品搬上餐台,可见优质甘薯的发展潜力是相当巨大的.但一些地方往往由于选用品种和栽培措施的不当,导致甘薯产量低、品质差,不能满足市场的需要.因此,只有选用良种并采用合理栽培措施,才能提高甘薯的产量和品质.下面着重介绍南方甘薯优质高产无公害栽培技术. 相似文献
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宁德市马铃薯不同稻草覆盖方式对比试验 总被引:1,自引:1,他引:0
为明确稻草包芯栽培的增产效果,以紫花851为供试材料,进行了稻草覆盖免耕、稻草包芯等不同栽培方式产量、效益及其商品性的比较。结果表明,马铃薯不同覆盖栽培方式对产量、效益、商品性影响不同,稻草覆盖免耕栽培处理与当地普通栽培处理相比,产量、效益差异达极显著水平,具增产增效、省工省力等优点;稻草包芯栽培处理与当地普通栽培处理相比,产量、效益差异也达显著水平,具有增产增效、操作简便、节省稻草等优点,并较好地解决了稻田土壤板结不利于薯块膨大和裂缝引起绿薯的问题,可扩大示范推广。 相似文献
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Dincer C Karaoglan M Erden F Tetik N Topuz A Ozdemir F 《Plant foods for human nutrition (Dordrecht, Netherlands)》2011,66(4):341-347
The effects of baking and boiling on the nutritional and antioxidant properties of three sweet potato cultivars (Beniazuma,
Koganesengan, Kotobuki) cultivated in Turkey were investigated. The samples were analyzed for proximate composition, total
phenolic content, ascorbic acid, β-carotene, antiradical activity, and free sugars. The dry matter, protein, and starch contents
of the sweet potatoes were significantly changed by the treatments while the ash and crude fiber contents did not differ as
significantly. The β-carotene contents of baked and boiled sweet potatoes were lower than those of fresh sweet potatoes; however,
the total phenolic and ascorbic acid contents of the baked and boiled sweet potatoes were higher than those of the fresh samples.
Generally, the antiradical activity of the sweet potatoes increased with the treatments. Sucrose, glucose, and fructose were
quantified as free sugars in all fresh sweet potatoes; however, maltose was determined in the treated samples. In terms of
the analyzed parameters, there were no explicit differences among the sweet potato cultivars. 相似文献
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辽宁省马铃薯高效复种栽培技术 总被引:1,自引:0,他引:1
经过多年试验示范,针对辽宁省气候特点,总结出马铃薯高效复种栽培模式,筛选出各主产区的适宜品种和相应种植密度,为辽宁省马铃薯科学种植提供依据。马铃薯的三膜覆盖极早熟栽培技术比较适合葫芦岛地区和大连地区应用,下茬复种小西瓜等经济效益较高的作物。马铃薯双膜覆盖栽培技术可克服前期低温的不利影响,缓解晚霜冻害,比常规地膜覆盖提前收获15 d以上,其鲜薯价格高,效益可观,为下茬复种粮食和油料作物高产创造条件,比较适合在辽西和辽南的大部分地区应用。马铃薯单膜覆盖栽培技术适用于辽宁大部分地区,下茬可复种蔬菜、粘(甜)玉米等作物。 相似文献
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晋西南山区川水地马铃薯不同栽培密度试验 总被引:1,自引:0,他引:1
对晋西南山区川水地覆膜种植的马铃薯主栽品种费乌瑞它进行不同栽培密度试验。试验结果的方差分析表明:每公顷密度在53 892~89 820株范围内,其单株商品薯数、单株薯重、单株商品薯重、小区产量、小区商品薯产量存在显著与极显著差异;单株结薯数无显著差异;小区产量以每公顷76 989株最高,小区商品薯产量以每公顷67 365株最高,而在生产实际中,追求更多的是商品薯产量,所以,该区域的马铃薯品种费乌瑞它覆膜种植以每公顷67 365株的密度为宜。 相似文献
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UV-C处理对甘薯贮藏品质的影响 总被引:1,自引:0,他引:1
以海南桥头产区的“高系14”甘薯为材料,分别进行10、20、30 min的UV-C照射处理,统计甘薯贮藏60 d内的腐烂率、失重率和发芽率,并同时记录5种生理指标的变化,以探讨UV-C处理对甘薯贮藏品质的影响。结果表明:UV-C处理显著降低了甘薯贮藏期间的腐烂率,但同时促进了发芽,而对失重率无显著影响。生理指标方面,30 min的UV-C照射提高了可溶性蛋白的积累,减少可溶性固形物的损耗,并促进了POD、SOD和CAT的总体酶活性。综合来说,UV-C处理若要应用于甘薯贮藏保鲜,还需辅助使用其他的抑芽手段。 相似文献
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In order to understand the extent of elimination of trypsininhibitors during processing of sweet potato (Ipomoea batatas) andtaro (Colocasia esculenta) tubers, a detailed study was conductedusing tubers processed by oven drying, cooking, and microwavebaking. Between 80 and 90% trypsin inhibitor (TI) activity wasretained in sweet potato chips up to 2h at 70 °C. Among thefour cultivars of sweet potatoes, RS-III-2 trypsin inhibitors were more heatlabile. Heating at 100 °C led to rapid inactivation of TI of sweetpotatoes. Varietal differences in thermal stability were more pronouncedfor the trypsin inhibitors of taro than sweet potatoes. Taro inhibitors werealso more rapidly inactivated than sweet potato TI. Between 17 and31% TI activity was retained in cooked tuber pieces of sweet potatoes,while only 3–10% were retained in taro cultivars. Very effectiveinactivation of trypsin inhibitors of sweet potatoes and taro could beobtained through microwave baking. Flour prepared from taro was devoidof TI activity, while 5–12% TI activity was retained in the flour preparedfrom sweet potatoes. The study clearly established that among the fourtechniques used, microwave baking and flour preparation were the best methods to eliminate TI from sweet potatoes and taro. 相似文献
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