Effects of Addition of Three Types of Biochar on the Soil Nitrogen Balance and Cotton Yield   总被引：1，自引：1，他引：0  

Huang Ting  Ni Jieqiang  Xu wenxia  Zhai Yong  Ye Jun  Hou Zhen’an 《棉花学报》2015,27(6):595-600

The objective of this study was to determine the effect of biochar addition on the soil N balance and cotton yield in a drip-irrigated cotton field. The experiment included four soil amendments: control, cotton straw biochar, corn cob biochar, and poultry manure biochar. The biochar was applied at a rate of 4.5 t·hm^－2 except control. The results showed that all three types of biochar significantly reduced both the apparent soil N loss and the N surplus. The effect of cotton straw biochar treatment was most significant, relative to the control. Plant nitrogen uptake differed significantly between the different treatments, decreasing in the order cotton straw biochar > poultry manure biochar > corn cob biochar. Cotton yield also differed significantly between the different treatments, decreasing in the order poultry manure biochar > corn cob biochar, and cotton straw biochar.  相似文献   

Brian K. Obach: Organic struggle: the movement for sustainable agriculture in the United States     

Kelly Yearick 《Agriculture and Human Values》2017,34(2):505-506

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农村非正式组织对农户收入影响的实证分析——以浙江省慈溪市为例     

杨德利  毛妤婷 《安徽农业大学学报》2016,(1):9-15

农民作为“三农”改革中受影响最深的群体，有着强烈的利益表达愿望，目前农村生产现状及国家相关法制尚不完善，使得农户的利益受到了损害，农户需要寻找一种途径来使自己受损的这部分利益得到补偿。在这种情况下，非正式组织的出现很好地弥补了这一空缺。国家可以根据非正式组织的特点，了解其运行模式的优越性，制定并健全相关政策制度，进行正面引导；另外对一些具有正面借鉴意义的非正式组织进行保护和支持，派遣相应的技术人员进行实地指导和培训，同时国家可以给予适当的补助，使其健康有序持续发展。  相似文献   

A.D. McIntyre (ed): Life in the world’s oceans—diversity,distribution and abundance     

Malcolm Jobling 《Aquaculture International》2011,19(3):597-598

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褪黑素对秦艽原生质体抗UV-B环境胁迫的作用     

张来军  贾敬芬  梅康  林德丽 《核农学报》2015,29(5)

为探讨褪黑素对UV-B辐射后的秦艽原生质体的影响,本研究采用单细胞凝胶电泳技术检测秦艽原生质体DNA损伤程度,选取尾部DNA含量(TailDNA％)作为DNA损伤程度的分析指标.MEL以0、1、10 μmol·L-1的终浓度加入原生质体悬液中,UV-B辐射处理的辐照度为0,5 W·m-2.试验分2组:1)原生质体分别用UV-B辐射处理不同的时间(0、5、10、30、60、120 s),暗培养60 min后电泳.2)原生质体被UV-B照射40 s后,分别暗培养不同时间(0、1、2、3、4、6h),再电泳.结果显示在5～30 s的时间内,辐射时间越长,Tail DNA％越高,相同的辐射时间下,MEL浓度越高,TailDNA％越低;在1～6 h培养时间内,MEL处理的样品,TailDNA％值均低于阳性对照组,并且TailDNA％值的大小与所处理的MEL的浓度呈反比关系.由此可见褪黑素降低了UV-B辐射诱导的植物原生质体DNA损伤程度,促进DNA损伤的修复.本试验应用SCGE技术,进一步揭示了MEL在植物抗环境胁迫中所起到的促进作用.  相似文献   

Effect of dietary Moringa stem meal level on growth performance,slaughter performance and serum biochemical parameters in geese     

Shuangshuang Zhai  Miaomiao Li  Mengmeng Li  Xiufen Zhang  Hui Ye  Zhenping Lin  Wence Wang  Yongwen Zhu  Lin Yang 《Journal of animal physiology and animal nutrition》2020,104(1):126-135

Moringa stem meal (MSM) with a high level of crude fibre (CF) might be developed and utilized in herbivorous geese as an unconventional feedstuff. The aim of this study was to investigate the effect of the MSM level in the diet on the growth performance, slaughter performance, breast meat quality and serum biochemical parameters in geese from 22 to 70 days of age. A one-factor completely randomized design was adopted in our study. A total of one thousand eight 21-day-old geese were randomly divided into six groups, with six replicates per group and 28 birds per replicate. The geese were fed diets containing MSM levels of 0, 20, 40, 60, 80 or 100 g/kg during day 22–70. The dietary MSM level had no effect (p > .05) on the final body weight (BW), average daily gain (ADG) or average daily feed intake (ADFI). The feed/gain ratio (F/G) increased linearly (p < .001) as the dietary MSM level increased. No differences (p > .05) were observed in the slaughter performance, meat quality and the relative organ weight (except for thymus) of the geese (p > .05). The relative weight of the thymus in the geese fed diets with supplementation of MSM was higher than that in the non-supplemented MSM control group (p < .05). In addition, 100 g MSM/kg of diet decreased the serum glucose (GLU) level (p < .05) and increased the alanine transaminase (ALT) enzyme activity (p = .03). Dietary MSM levels of no more than 60 g/kg had no effects on the growth performance and slaughter performance, whereas diets with 100 g MSM/kg increased the F/G and serum ALT enzyme activity, as well as decreasing the serum GLU level. Therefore, MSM provided at a reasonable level could be developed as an unconventional feedstuff for geese at the finisher period.  相似文献   

Comments on soil memory and paleo-environmental reconstruction of soil evolution     

Dan Yaalon 《Eurasian Soil Science》2011,44(4):462-463

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Functional porous carbons from waste cotton fabrics for dyeing wastewater purification     

Shuhua Wang  Meixia Wei  Qiaoli Xu  Husheng Jia 《Fibers and Polymers》2016,17(2):212-219

A new functional porous carbons (PC-WF) is prepared by activation-pyrolysis method use waste cotton fabrics (WF) as an abundant, cheap and available precursor for removal of Brilliant Crocein (BC-GR) and Cationic Red 2GL (CR-GL) from aqueous phase. The PC-WF was characterized by BET, FTIR, SEM, and XRD techniques, the surface area, total pore volume, average pore diameter was found as 1463.5 m² g^-1, 0.783 cm³ g^-1 and 2.14 nm, respectively. The influences on BC-GR and CR-GL adsorption of various experimental factors such as initial concentration and temperature were investigated. Adsorption kinetics was found to be best represented by the pseudo-second order model. The adsorption capacity was 319.8 mg g^-1 for BC-GR and 842.5 mg g^-1 for CR-GL at 30 °C, respectively. The results indicate that for waste cotton fabrics in particular, the practical application of this process to the production of porous carbon would be possible.  相似文献   

Pasteur’s quadrant: an appealing <Emphasis Type="Italic">ecophronetic</Emphasis> alternative to the prevalent Bohr’s quadrant in ecosystem services research     

Wei-Ning Xiang 《Landscape Ecology》2017,32(12):2241-2247

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Kristina Roesel and Delia Grace (eds): Food safety and informal markets: animal products in sub-Saharan Africa     

Ann Waters-Bayer 《Agriculture and Human Values》2016,33(2):493-494

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