The effect of biodegradable nonwovens in butterhead lettuce cultivation for early harvest
The effect of biodegradable nonwovens in butterhead lettuce cultivation for early harvest
复制标题
可生物降解非织造布在油菜早收栽培中的效果
DOI：
10.2478/v10245-012-0020-2
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发表时间：
2012
影响因子：
2
通讯作者：
Izabela Zawiska
中科院分区：
文献类型：
--
作者：
P. Siwek;A. Libik;Izabela Zawiska
摘要采用“熔喷法”可生物降解非织造布对“Melodion”油麦菜进行了田间试验。capitata L.）早期收获的品种。所有可生物降解的非织造布都是在波兰的生物聚合物和化学纤维研究所和POLMATEX CENARO生产的。3月初，在温室里把莴苣种子播种到盒子里，4月初移栽到地里。将可生物降解的非织造物-芳香族聚酯IBWCH 75 g m-2、聚丁二酸丁二醇酯Bionolle 100 g m-2和标准聚丙烯PP Agro 20 g m-2 -在田间的莴苣上拉伸。将覆盖物保持在收获前4-5天。将没有覆盖物的地块定义为对照。测定了叶片中抗坏血酸、可溶性糖、干物质、硝酸盐、叶绿素a、叶绿素B和类胡萝卜素的含量。与2009年的对照相比，所有可生物降解的非织造布都显示出对产量的积极影响。在实验的第二年，有没有关于产量方面的覆盖之间的显着差异。干物质和可溶性糖含量在试验的两个年份是多样化的。与对照相比，2009年用作覆盖物的非织造布显着增加了硝酸盐的含量。在第二年，硝酸盐的最高水平被证明在控制对象。值得强调的是，生菜中硝酸盐含量的最高允许限值（4000 mg kg f.w.）没有超过。不同覆盖方式对2009年生菜叶绿素a含量、2009年和2010年生菜叶绿素B和类胡萝卜素含量没有显著影响
Abstract Field experiments using ‘melt-blown’ biodegradable nonwovens were carried out on the ‘Melodion’ butterhead lettuce (Lactuca sativa var. capitata L.) cultivar for early harvest. All biodegradable nonwovens were manufactured in the Institute of Biopolymers and Chemical Fibres and POLMATEX CENARO in Łódź, Poland. Lettuce seeds were sown into boxes in a greenhouse at the beginning of March, and transplants were planted into the field at the beginning of April. Biodegradable nonwovens - aromatic polyester IBWCH 75 g m-2, polybutylene succinate Bionolle 100 g m-2 and standard polypropylene PP Agro 20 g m-2 - were stretched over the lettuce in the field. The covers were kept on until 4-5 days before harvest. Plots without covers were defined as the control. Ascorbic acid, soluble sugar, dry matter, nitrates, chlorophyll a, chlorophyll b and carotenoid contents were recorded in the leaves. All biodegradable nonwovens showed a positive effect on yielding in comparison to the control in 2009. In the second year of the experiment, there were no significant differences between covers with regard to the yield. Dry matter and soluble sugar content in both years of the experiment was diversified. Nonwovens used as covers in 2009 significantly increased the content of nitrates in comparison to the control. In the second year, the highest level of nitrates was demonstrated in the control object. It is worth underlining that the maximum allowed limit of nitrate content in lettuce (4000 mg kg f.w.) was not exceed. The kind of cover had no significant effect on the level of chlorophyll a in 2009 or chlorophyll b and carotenoids in 2009 and 2010 in the lettuce