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试验结果认为,在齐齐哈尔地区多为偏碱性土壤情况下,甜菜纸筒育苗应选用中性、微酸性土壤作床土;床土中的N肥量可以扩大到0.1kg/4册;为提高育苗温度,除选地势高的地方外,还应在育苗床下垫秸杆等杂物,并选用双层膜棚,注意通风等提高育苗质量。 相似文献
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甜菜纸筒育苗移栽机械化技术 总被引:3,自引:0,他引:3
介绍了甜菜纸筒育苗机械化的主要设备及其工艺流程,阐述了甜菜纸筒育苗移栽的技术要求及甜菜移栽机的类型和工作原理.实现甜菜纸筒育苗移栽机械化不仅能够保证甜菜纸筒秧苗的移栽质量,而且能够提高劳动生产率,已成为甜菜生产的必然选择. 相似文献
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甜菜是喜肥水块根作物。在生育中期,即7月中旬~8月中旬大约30d是甜菜需水临界期,这个时期,满足其对水分的需求,对后期块根的增重、含糖的提高起决定性的作用,尤其是纸筒育苗移栽甜菜。本试验就灌溉对纸筒育苗移栽甜菜产、质量的影响进行了探讨。1材料与方法试... 相似文献
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甜菜纸筒育苗床土掺拌马粪试验简报王井茂,马洪文,周北翔,贾宏云,刘桂菊,周志宽(黑龙江省友谊糖厂)甜菜纸筒育苗在佳木斯地区已推行10多年,在多数地区增产效果比较显著。纸筒育苗增产的原因之一是可培育壮苗,当然要求苗床有充足水分、养分及合适温度条件等。此... 相似文献
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浅析纸筒育苗配套栽培技术 总被引:1,自引:0,他引:1
浅析纸筒育苗配套栽培技术史坚,周绍斌,程显伟,孙连元,王光申(黑龙江省红兴隆农管局)(黑龙江省友谊农场)1995~1996年黑龙江省友谊农场在完成国家甜菜“丰收计划”中,近7万亩甜菜全部采用纸筒育苗移栽新技术(品种为进口KWS5l73单芽种).两年实... 相似文献
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从营养土的配制方法、育苗床的选择、浇水、播种、建棚、苗期管理等方面详细介绍了黑龙江省望奎地区甜菜纸筒育苗的关键技术环节。 相似文献
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Systemic and asymptomatic Neotyphodium fungal endophytes infect numerous species of the Poaceae. The frequencies of Neotyphodium endophyte infection in Finland were investigated among and within seven Nordic cultivars of meadow fescue, Schedonorus pratensis (Huds.) P. Beauv., which is a widely grown pasture and forage grass species in Scandinavia. The cultivars were Kasper, Salten, Antti, Fure, Ilmari, Inkeri and Kalevi. Frequencies of infection of cultivars varied from endophyte-free cultivar Fure to highly infected cultivar Inkeri [mean (standard deviation of mean) of 0·95 (0·023)]. Mean frequencies of infection of three cultivars remained lower than 0·10, and two of the cultivars, Kasper and Salten, were intermediately infected. In most of the cultivars, frequencies of infection varied only slightly among seed lots. In cultivar Kasper, however, the frequency of endophyte infection was highly variable (0–0·96) among the 45 seed lots examined. The relative importance of cultivar, seed lot and infection by Neotyphodium endophyte to the aphid Rhopalosiphum padi L. was studied experimentally, using both endophyte-free and endophyte-infected plants of four seed lots of the two intermediately infected cultivars. Endophyte infection increased plant resistance to R. padi , overriding the influences of seed lot and cultivar. It is proposed that variation caused by endophyte infections in cultivars of meadow fescue should be taken into account in assessing plant breeding programmes in Europe. 相似文献
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Quynh-Hoa Pham Xuan-An Tran Thi-Nha-Trang Nguyen Thi-Thuy-Anh Tran Hai-Yen Hoang Thi-Hong-Van Nguyen Thi-Hanh Tang Thi-Phuc Do 《水稻科学》2016,23(6):334
Rice(Oryza sativa) is sensitive to salinity, but the salt tolerance level differs among cultivars, which might result from natural variations in the genes that are responsible for salt tolerance. High-affinity potassium transporter(HKTs) has been proven to be involved in salt tolerance in plants. Therefore, we screened for natural nucleotide polymorphism in the coding sequence of Os HKT1, which encodes the HKT protein in eight Vietnamese rice cultivars differing in salt tolerance level. In total, seven nucleotide substitutions in coding sequence of Os HKT1 were found, including two non-synonymous and five synonymous substitutions. Further analysis revealed that these two non-synonymous nucleotide substitutions(G50T and T1209A) caused changes in amino acids(Gly17Val and Asp403Glu) at signal peptide and the loop of the sixth transmembrane domain, respectively. To assess the potential effect of these substitutions on the protein function, the 3D structure of HKT protein variants was modelled by using PHYRE2 webserver. The results showed that no difference was observed when compared those predicted 3D structure of HKT protein variants with each other. In addition, the codon bias of synonymous substitutions cannot clearly show correlation with salt tolerance level. It might be interesting to further investigate the functional roles of detected non-synonymous substitutions as it might correlate to salt tolerance in rice. 相似文献
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试验以5个生产用马铃薯品种脱毒试管苗为材料,采用组织培养的方法,初步研究了茎切段在正常磷及低磷培养基中生长30 d时幼苗的磷营养效率差异,为筛选出适宜于生产用的磷高效马铃薯品种奠定了基础。试验结果表明,5个马铃薯品种幼苗在正常磷和低磷胁迫下对磷素的吸收和利用能力均存在明显的基因型差异。利用各品种幼苗的磷效率指标(植株干重、鲜重、吸磷量、磷利用效率)的相对指标(低磷处理的结果/正常磷处理的结果×100)进行聚类分析(类平均法)的结果表明,大白和I-1035属于磷高效基因型品种,中农Ⅷ是磷低效基因型品种,凉薯97和疫不加则属于中间类型品种。 相似文献
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我国香蕉深加工问题探讨 总被引:1,自引:0,他引:1
发展香蕉深加工是发展香蕉产业的重要途径。本文阐述香蕉的营养价值和经济价值,综述香蕉深加工研究进展,指出香蕉深加工中存在的问题,并提出发展对策。 相似文献
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采用倒置“W”9点取样法对新疆亚麻主栽区——伊犁地区亚麻田进行了杂草调查。结果表明伊犁地区亚麻田的杂草有15科26种,单子叶杂草狗尾草、稗草、野燕麦,双子叶杂草灰绿藜、卷茎蓼的相对多度在20以上,是亚麻田杂草的优势种群。 相似文献