什么是有机耕作
用生物学方法施肥和防治病虫害来代替化学肥料和杀有害生物剂的作物耕种方法。有机耕作法的支持者认为,化学肥料和杀虫剂有害健康,且污染环境,不是良好的收成所必需。有机耕作法有意识地摒弃现代农业化学技术,起源於1930年代,由英国农业科学家霍华德爵士所采用。各种的有机物质,包括动物粪肥、堆肥、草皮、秸秆和其他作物残留物,将其施用於田地,以便改良土壤结构和提高保水能力,并供给土壤养分,从而种植出富含养分的植物(相反地,使用化学肥料是直接给予植物养分)。病虫害的生物防治是采取预防的方法,包括多种栽种、轮作和栽种抗病虫害作物,并采用病虫害整合管理技术。避免使用生物工程制造出的品种。由於有机耕作困难且耗时,因为有机农作物价钱较昂贵。有机农作物过去只占美国农产品总输出的极少部分,但近年来的销售量已有大幅度的成长。
organic farming
System of crop cultivation that uses biological methods of fertilization and pest control as substitutes for chemical fertilizers and pesticides, which are regarded by supporters of organic methods as harmful to health and the environment and unnecessary for successful cultivation. It was initiated as a conscious rejection of modern agri-chemical techniques in the 1930s by the British agronomist Sir Albert Howard. Miscellaneous organic materials, including animal manure, compost, grass turf, straw, and other crop residues, are applied to fields to improve both soil structure and moisture-holding capacity and to nourish soil life, which in turn nourishes plants. (Chemical fertilizers, by contrast, feed plants directly.) Biological pest control is achieved through preventive methods, including diversified farming, crop rotation, the planting of pest-deterrent species, and the use of integrated pest management techniques. Bioengineered strains are avoided. Since organic farming is difficult and time-consuming, organically grown produce is expensive. Organic produce formerly accounted for a minuscule portion of total American farm output, but has seen a huge proportional increase in sales in recent years.
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隋侯之珠是什么意思?
意思是:隋:古国名。比喻珍贵的物品。成语名字:隋侯之珠成语发音:suíhóuzhīzhū成语解释:隋:古国名。比喻珍贵的物品。成语出处:《庄子让王》:“今且有人于此,以隋侯之珠,弹千仞之雀,世必笑之。是何也?则其所用者重,而所要者轻也。《淮南子览冥训》:“譬如隋侯之珠,和氏之璧...
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谩不经意是什么意思?
意思是:谓随随便便不放在心上。谩,通“漫”。成语名字:谩不经意成语发音:mànbùjīngyì成语解释:谓随随便便不放在心上。谩,通“漫”。成语出处:明·张居正《乞鉴别忠邪以定国事疏》:“今谓皇上谩不经意,一切委之于臣,何其敢于厚诬皇上邪?”成语繁体:謾不經意感情色彩:中...
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折箭为誓是什么意思?
意思是:折断箭以表示自己的决心和誓约。成语名字:折箭为誓成语发音:shéjiànwéishì成语解释:折断箭以表示自己的决心和誓约。成语出处:宋·岳珂《桯史·二将失律》:“虏既得俊迈,折箭为誓,启门以出二将。”成语繁体:摺箭為誓感情色彩:中性成语成语用法:作宾语、定语;用...
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与物无忤是什么意思?
意思是:谓处世态度随和,与人无所抵触。成语名字:与物无忤成语发音:yǔwùwúwǔ成语解释:谓处世态度随和,与人无所抵触。成语出处:《周书·苏亮传》:“宝夤作乱,以亮为黄门侍郎。亮善处人间,与物无忤。及宝夤败,从之者遇祸,唯亮获全。”成语繁体:與物無忤感情色彩:中性成语成...