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东北苏打盐碱地生态渔业模式研究 总被引：1，自引：0，他引：1
试验结果表明 ,东北苏打盐碱地实施鱼 稻 苇 蒲生态渔业模式效益显著 ,平均单产水稻为 6 0 2 4 .2kg/hm2 、芦苇 8336 .2kg/hm2 和蒲草 7387.6kg/hm2 ;平均鱼产量稻田养鱼为 912 .1kg/hm2 、蒲塘养鱼 35 37kg/hm2 和苇塘养鱼2 76 6kg/hm2 ;平均净收入 5 6 6 7.1元 /hm2 ,产投比为 2 .0 74。 1个生长期节水 1.9万m3 /hm2 ,节约化肥 2 90kg/hm2 ,降低土壤盐分 5 0 7kg/hm2 。 相似文献
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Wu Baoguo Yang Yirong Pan Xuefeng Wang Xiaoshui Liu Guangping Northeast Forestry University 《林业研究》1992,(1)
The slurry sealing with cationic emulsified asphalt,which is a new technique inhighway construction,is rapidly extended at home and abroad.The technique should apply an ex-cellent slow set cationic cmulsifier.Now,slow set emulsifiers are ligninamines which are synthesizedby trimethylamine-epichlorohydrin route.Owing to high price and unstable quality,the extendingof slurry sealing technique is affected seriously.We prepare the ligninamine by a novel syntheticmethod.By the novel method,the cost of production is reduced by more than 30%,and the prod-ucts have stable quality,high emulsifying function and broad daptability for various asphalts.Thenovel synthetic method uses soda lignin,secondary amines and inexpensive aminating assistants asraw materials.The technological process of the method may use either one or two-step process,andthe technological condition are uncomplicated and easy to master.master. 相似文献
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The effects of mixed soda saline-alkali (NaHCO3:Na2CO3=9:1) at different concentrations (10,20,30,40 and 50 mmol·L-1) on the germination of five Longmu alfalfa seeds were studied. The results showed that the germination rate,germination potential,germination index,vigor index,dry weight,fresh weight,water content,embryo length,radicle length of alfalfa seeds showed different trends under different mixed soda saline-alkali concentrations. Through principal component analysis of nine indicators,GR,GP,GI,VI,FW,WC and EL indicators were screened out to be related to salt and alkali tolerance of Longmu alfalfa varieties. According to the analysis of membership function,weight coefficient and D value of comprehensive evaluation,the salt and alkali tolerance of five longmu alfalfa varieties were in the order of LM 807 > LM 808 > LM 806 > LM 803 > LM 801. © 2019 Ｊｏｕｒｎａｌ ｏｆ Ｒｅｆｒｉｇｅｒａｔｉｏｎ. All rights reserved. 相似文献
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C. Brattey J. L. Badge R. Burns G. D. Foster E. George H. A. Goodfellow V. Mulholland J. G. McDonald C. J. Jeffries †‡ 《Plant pathology》2002,51(4):495-505
A previously undescribed carlavirus, potato latent virus (PotLV), was found infecting the potato cultivar Red La Soda imported from the USA. The particles were filamentous and slightly curved, with modal lengths of 530 and 670 nm. The 11 kDa protein encoded downstream from the coat protein contained a 'zinc-finger' motif characteristic of carlaviruses, and RT–PCR using a carlavirus-specific primer gave a PCR product of 857 bp. Antibodies produced to PotLV did not detect other carlaviruses when used in ELISA and the coat-protein nucleic acid sequence of PotLV showed < 67% similarity with the other carlaviruses tested. The closest similarity was with the Andean strain of potato virus S. Unusually for a carlavirus, PotLV systemically infected Nicotiana bigelovii , N. glutinosa , N. rustica , N. tabacum and Physalis floridana . 相似文献
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已有的科学研究和生产实践证明,添加脱硫石膏可以有效改良东北苏打盐碱土。但通过添加脱硫石膏如何影响土壤水分入渗性能及盐碱土性质的相关研究还比较缺乏。本文通过室内土柱淋洗试验,明确了土壤入渗效率随脱硫石膏用量的增加而增加,能够有效降低盐碱土的pH、EC、碱化度等,为盐碱土壤的改良修复提供了理论依据。 相似文献
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研究了用酸化法从黑液中提取碱木素的工艺。用芦苇碱木素为原料,通过新的合成路线制备了LJ-1沥青乳化剂。LJ-1沥青乳化剂是慢裂型阳离子沥青乳化剂,乳化性能良好,各项性能均达到JTJ014-86标准,适于稀浆封层拌合摊铺等施工技术。LJ-1沥青乳化剂的生产成本,比国內同类产品低20％多,用量少(20％-50％)。生产LJ-1沥青乳化剂具有良好的经济效益和社会效益。 相似文献