钾肥施用量对脐橙产量和品质的影响   总被引：30，自引：0，他引：30  

鲁剑巍  陈防  万运帆  刘冬碧  余常兵  王耀群  宋发安  王运华  Rolf Hardter 《果树学报》2001,18(5):272-275

１９９６～１９９９年连续４年在湖北省秭归县进行了脐橙钾肥施用量田间试验。结果表明，尽管各处理脐橙产量年度变化很大，但施钾显著提高产量和经济效益，１９９７～１９９９年施钾平均增产２６．３％～４１．８％，施钾（Ｋ２Ｏ）１２５、２５０、３７５ｋｇ／ｈｍ２年均增加纯利 １０１１０、１５８４０、９９７０元／ｈｍ２，产投比分别为 １９．３８、１５．４０和７．０４；在试验条件下施钾（Ｋ２Ｏ）２５０ｋｇ／ｈｍ２增产效果最好；施钾有提高脐橙外观品质和内在品质的趋势，例如施钾提高或保持单果重、增加果皮厚度、提高维生素Ｃ含量等；但施钾对品质的影响年度间差异较大，尚需进一步研究。  相似文献   

Serological study on the occurrence of bovine leukosis in Switzerland]     

F Steck  H Kupferschmied  W Leemann  R Kaderli  W Bommeli  P Gafner  H K Sp?rri 《Schweizer Archiv für Tierheilkunde》1979,121(9):439-450

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The Influence of Organic and Integrated Production on Nutritional,Sensory and Agricultural Aspects of Vegetable Raw Materials for Food Production     

Stina Fjelkner-Modig  Håkan Bengtsson  Stig Nystrõm  Rolf Stegmark 《Acta Agriculturae Scandinavica, Section B - Plant Soil Science》2013,63(3):102-113

In a six-year crop rotation trial organically and integrated grown vegetables were produced according to current good agricultural practices, taking quality and quantity aspects into consideration. The raw materials assessed focussed on materials used for industrial food production. Nutritional, sensory and agricultural aspects were evaluated. Carrot, cabbage, onion, pea and potato are possible to grow organically for industrial purposes. Depending on crop, the yield was lower (65-90%) for organically grown compared to integrated grown. Cultivation of organic spinach and dill turned out to be difficult due to problems with weed and discoloration. The chemical analyses included pesticide residues, nitrate, glycoalkaloid, dry matter, vitamin C and 25 different minerals and trace elements. Overall, the organically grown crops had higher dry matter content than the integrated grown. However, when examining the data for the different crops contradictory results were noted. No significant differences due to growing system were noticed for vitamin C and the other nutrients except for 4 of the trace elements. The growing system did not influence the sensory properties.  相似文献   

Novel inhibitors of sterol C-14 demethylase and Δ14 Reductase/Δ8 → Δ7 isomerase for cereal disease control     

Petr Masner  Christopher C. Steel  Rolf Furter  Hans Peter Isenring  Gottfried Oesterhelt  Hugo Ziegler  Peter Zobrist 《Pest management science》1992,35(4):339-347

The activity of five experimental fungicides combining structural elements responsible for sterol C-14 demethylase inhibition and sterol nuclear double-bond transformations has been investigated by examining sterol accumulation in Ustilago maydis (DC.) Corda, inhibition of sterol-biosynthesis enzymes in Saccharomyces cerevisiae Meyer using a cell-free system and protective activity in cereals against Erysiphe graminis DC. and Puccinia coronata Corda. Combining the fenpropidin/fenpropimorph basic structure with a pyridine moiety offered no advantage in fungicidal activity. However, the combination of the pyrifenox structure with a morpholine moiety yielded a compound which was a good inhibitor of C-14 demethylase and Δ⁸ → Δ⁷ isomerase in vitro and gave good cereal protection.  相似文献   

Diagnosis of intrapulmonary ventilation disorders     

H Sp?rri  M Denac 《Schweizer Archiv für Tierheilkunde》1970,112(9):408-419

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Influence of low phosphorus intake during early lactation on apparent digestibility of phosphorus and bone metabolism in dairy cows   总被引：1，自引：0，他引：1  

Adrienne Ekelund  Rolf Sprndly  Kjell Holtenius 《Livestock Science》2006,99(2-3):227-236

In this study, the effects of reducing the dietary phosphorus (P) supply during the first 4 months of lactation on P balance and bone metabolism were investigated in dairy cows during a full lactation, including the dry period. Twenty-two multiparous cows of the Swedish Red and White Breed were included in the experiment. Eleven cows received a dietary P concentration of 0.43% of DM during the whole lactation (NP), and 11 cows received a dietary P concentration of 0.32% of DM during the first 4 months of lactation, followed by 0.43% of DM during the rest of lactation (LP). Total collection of faeces was carried out during five different stages of lactation, for 5 consecutive days at each occasion. The dynamics of bone metabolism was investigated by monitoring one bone-formation marker, identifying osteocalcin (OC), and one bone-resorption marker identifying C-telopeptide fragments of collagen type I (CTx) in blood plasma. At the two first collection periods, 3–7 and 11–15 weeks after parturition, the apparent digestibility of P was higher in the LP cows (52%) than in the NP cows (42%). During the following collection periods, no difference in the apparent digestibility could be noted between the two groups of cows. Phosphorus retention did not differ between treatments at any collection period. The highest retention was observed during late lactation and during the dry period. The profiles of the bone metabolism markers indicated a net resorption of bone during early lactation, but there were no differences in marker concentrations between the groups during early lactation, indicating that the LP diet did not induce a further elevated net bone resorption.  相似文献   

Literarische Berichte     

Dr. Sp.  F. 《European Journal of Forest Research》1907,29(4):246-250

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Kaffeebohrerstudium     

Sp. 《Journal of pest science》1927,3(3):35

Ohne Zusammenfassung  相似文献   

Le Pyrèthre Français     

Sp. 《Journal of pest science》1937,13(2):21-22

Ohne Zusammenfassung  相似文献   

Obstmade in den Vereinigten Staaten     

Sp. 《Journal of pest science》1937,13(11):138-139

Ohne Zusammenfassung  相似文献