ES Journal of Agriculture and Current Research最新文献

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Light-Trap Catch of Lygus sp. (Heteroptera, Miridae) in Connection with the Stanford Mean Solar Magnetic Feld 斯坦福平均太阳磁场对盲蝽光诱捕获的影响

ES Journal of Agriculture and Current Research Pub Date : 1900-01-01 DOI: 10.59152/esjacr/1010

L. Nowinszky

{"title":"Light-Trap Catch of Lygus sp. (Heteroptera, Miridae) in Connection with the Stanford Mean Solar Magnetic Feld","authors":"L. Nowinszky","doi":"10.59152/esjacr/1010","DOIUrl":"https://doi.org/10.59152/esjacr/1010","url":null,"abstract":"Introduction: In an earlier work we found that some Trichoptera species from Hungary, Lepidoptera species from Hungary, Australia and two states of the USA react to changes in the solar magnetic field values. We examined in the current study the Stanford mean solar magnetic field how affect the light-trap catches of the Lygus species (Heteroptera: Miridae). Material: In our study we use the data of Stanford mean solar magnetic field published by the Wilcox Solar Observatory from 1980 to 1995. The light-trap data of Lygus sp. were used 41,830 individuals, 2,588 monitoring data and 1,342 nights. Methods: We have calculated the relative catch values of the number of specimens trapped by years. For all species the relative catch (RC) data was classified into the appropriate values of solar magnetic fields. Values of solar magnetic fields and the corresponding catch data were organized into classes. By species we depicted in figures the data coming from the different solar magnetic field and the RC values. Results: This result is very similar to the results reported in our latest book [7]. In this we found that some Trichoptera species from Hungary, Lepidoptera species from Hungary, Australia and USA react in the same way to changes in the solar magnetic field values. Stanford mean solar magnetic field, affects the efficiency of light trapping of various insect taxa. This influence can be experienced on three continents. Even if we process a huge amount of catch data, we cannot get significant results in two cases. One case is when we only have data from a single or a few light-traps. Then the standard deviations are large due to the significantly different catch data on different days. In this work, both conditions were met. According to the above, we accept our results as real.","PeriodicalId":224543,"journal":{"name":"ES Journal of Agriculture and Current Research","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129552745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Technological Quality of Potato Tubers: Effect of Potassium Fertilization and Application Time 马铃薯块茎的工艺品质:施钾和施钾时间的影响

ES Journal of Agriculture and Current Research Pub Date : 1900-01-01 DOI: 10.59152/esjacr/1011

D. Mnayer

{"title":"Technological Quality of Potato Tubers: Effect of Potassium Fertilization and Application Time","authors":"D. Mnayer","doi":"10.59152/esjacr/1011","DOIUrl":"https://doi.org/10.59152/esjacr/1011","url":null,"abstract":"The effect of potassium fertilization and time of application on yield and tuber quality of potato (Solanum tuberosum L., cv. Agria) was studied in Bekaa region in Lebanon. Potassium was applied in one split at tuber initiation (T1) and at tuber bulking (T2) in four different rates: K0 (0 kg/ha), K1 (100 kg/ha), K2 (200 kg/ha) and K3 (300 kg/ha). Results showed that aerial dry matter decreased and tuber dry matter increased during the growing period. The dry matter accumulation was dependent on potassium fertilization. Potassium concentration gradually decreased in leaves and increased in tubers during the growing period, while the most potassium treatment (K3) has accumulated at harvest, higher potassium concentrations in leaves and tubers, with more emphasis to application time T2 with respect to T1. Moreover, potassium has accelerated significantly (p<0.05) tuber dry matter accumulation. This was revealed by growth rate and harvest index values that were significantly higher (p<0.05) in K3 treatment with comparison to other treatments. Results also showed that fresh tuber yields increased with potassium fertilization and were more pronounced with T2 application whereas K3 had significantly (p<0.05) the highest value of 62.9 t/ha (K3). Yield augmentation was primarily due to an increase in tuber size in the larger (> 60 mm) and the medium (35 – 60 mm) grades. In addition, results showed that tuber dry matter content and specific gravity were statistically dependent on potassium fertilization and application time (p<0.05). The highest potassium treatment K3, regardless of application time, gave the best tuber quality of industrial potato by having the highest dry matter and the lowest reducing sugar contents. Finally, the results of this study suggest that maximum potato yield was obtained with K3 treatment (300 kg/ ha) applied during tuber bulking stage (T2).","PeriodicalId":224543,"journal":{"name":"ES Journal of Agriculture and Current Research","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133103592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0