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Effects of planting dates and shading on carbohydrate content,yield,and fiber quality in cotton with respect to fruiting positions 被引量:2
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作者 ZHAO Wen-qing WU You +5 位作者 Zahoor Rizwan WANG You-hua MA Yi-na CHEN Bing-lin MENG Ya-li ZHOU Zhi-guo 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2018年第5期1106-1119,共14页
Two cotton(Gossypium hirsutum L.) cultivars, Kemian 1(cool temperature-tolerant) and Sumian 15(cool temperaturesensitive) were used to study the effects of cool temperature on carbohydrates, yield, and fiber qua... Two cotton(Gossypium hirsutum L.) cultivars, Kemian 1(cool temperature-tolerant) and Sumian 15(cool temperaturesensitive) were used to study the effects of cool temperature on carbohydrates, yield, and fiber quality in cotton bolls located at different fruiting positions(FP). Cool temperatures were created using late planting and low light. The experiment was conducted in 2010 and 2011 using two planting dates(OPD, the optimized planting date, 25 April; LPD, the late planting date, 10 June) and two shading levels of crop relative light rate(CRLR, 100 and 60%). Compared with fruiting position 1(FP1), cotton yield and yield components(fiber quality, leaf sucrose and starch content, and fiber cellulose) were all decreased on FP3 under all treatments. Compared with OPD-CRLR 100%, other treatments(OPD-CRLR 60%, LPD-CRLR 100%, and LPD-CRLR 60%) had significantly decreased lint yield at both FPs of both cultivars, but especially at FP3 and in Sumian 15; this decrease was mainly caused by a large decline in boll number. All fiber quality indices decreased under late planting and shading except fiber length at FP1 with OPD-CRLR 60%, and a greater reduction was observed at FP3 and in Sumian 15. Sucrose content of the subtending leaf and fiber increased under LPD compared to OPD, whereas it decreased under CRLR 60% compared to CRLR 100%, which led to decreased fiber cellulose content. Therefore, shading primarily decreased the "source" sucrose content in the subtending leaf whereas late planting diminished translocation of sucrose towards cotton fiber. Notably, as planting date was delayed and light was decreased, more carbohydrates were distributed to leaf and bolls at FP1 than those at FP3, resulting in higher yield and better fiber quality at FP1, and a higher proportion of bolls and carbohydrates allocated at FP3 of Kemian 1 compared to that of Sumian 15. In conclusion, cotton yield and fiber quality were reduced less at FP1 compared to those at FP3 under low temperature and low light conditions. Thus, reduced cotton yield and fiber quality loss can be minimized by selecting low temperature tolerant cultivars under both low temperature and light conditions. 展开更多
关键词 cotton planting date and shading fruiting position yield fiber quality
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Er-doped concentric-cores optical fiber for simultaneous amplification and compensation of positive dispersion 被引量:1
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作者 P.ramodR.Watekar M.L.N.Goswami +2 位作者 H.N.Acharya J.C.Biswas B.P.Pal 《Chinese Optics Letters》 SCIE EI CAS CSCD 2004年第1期12-14,共3页
The Er-doped concentric-cores dispersion compensating fiber (EDDCF) has been demonstrated. The rare earth has been doped as a ring around the inner core. We have obtained 14-dB gain at 1550 nm (using 100-mW pump power... The Er-doped concentric-cores dispersion compensating fiber (EDDCF) has been demonstrated. The rare earth has been doped as a ring around the inner core. We have obtained 14-dB gain at 1550 nm (using 100-mW pump power and 980-nm wavelength) with dispersion of about -165 ps/(km·nm). It is useful for the optical fiber network where amplification as well as negative dispersion are necessary. 展开更多
关键词 nm Er-doped concentric-cores optical fiber for simultaneous amplification and compensation of positive dispersion MCVD
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A novel 2-dimensional cosmic ray position detector based on a CsI(Na) pixel array and an ICCD camera
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作者 葛永帅 王志刚 +14 位作者 俞伯祥 谢宇广 章爱武 薛镇 刘颖彪 高龙 牛顺利 蔡啸 方建 孙希磊 吕绮雯 宁飞鹏 周莉 胡涛 吕军光 《Chinese Physics C》 SCIE CAS CSCD 2012年第11期1101-1105,共5页
A novel 2-D cosmic ray position detector has been built and studied. It is integrated from a CsI(Na) crystal pixel array, an optical fiber array, an image intensifier and an ICCD camera. The 2-D positions of one cos... A novel 2-D cosmic ray position detector has been built and studied. It is integrated from a CsI(Na) crystal pixel array, an optical fiber array, an image intensifier and an ICCD camera. The 2-D positions of one cosmic ray track is determined by the location of a fired CsI(Na) pixel. The scintillation light of these 1.0× 1.0 mm CsI(Na) pixels is delivered to the image intensifier through fibers. The light information is recorded in the ICCD camera in the form of images, from which the 2-D positions can be reconstructed. The background noise and cosmic ray images have been studied. The study shows that the cosmic ray detection efficiency can reach up to 11.4%, while the false accept rate is less than 1%. 展开更多
关键词 cosmic ray 2-D position CsI(Na) crystal pixel array optical fiber array image intensifier ICCD camera
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