Category: Растения

Abstract

Fertilizer plays an important role in increasing rice yield. More than half of all fertilizer applied to the field is not taken up, resulting in environmental damage and substantial economic losses. To address these concerns, a low-cost, coated compound fertilizer named “Xiang Nong Da” (XND), requiring only a single basal application, was studied. A two-year field experiment was conducted to test the effects of XND application on rice yield and nitrogen fertilizer use efficiency. An ordinary uncoated compound fertilizer (UNCF), with 20% more nutrients and split application was selected as the control. The yield of XND-treated rice was only 3.1% lower than that of the control, an insignificant difference. There were no significant differences between N use efficiency indices of the two fertilizer treatments except for N partial factor productivity (PFP N). PFP N of XND treatment was 19.7%–23.2% higher than the control, a significant difference. This result indicates that a 20% decrease in N application rate is possible with XND without yield reduction and with savings in both labor and time.

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Plumeria Rubra / Wikipedia

Plumeria Rubra / Wikipedia

Leaf area (LA) is an important parameter in many plant modeling studies.There is a need for a simple, accurate and non-destructive model to predict LA in physiological experiments in which destructive LA sampling is not allowed (e.g., rare plants or genetically segregating populations). In this study, a model for LA estimation was developed for Plumeria rubra L. using simple linear measurements of leaf length (L) and maximum width (W). Two experiments were carried out, one in 2012 (on seven commercial genotypes: ‘California Sunset’, ‘Christina’, ‘Elsie’, ‘Gina’, ‘J.J. Mini White’, ‘Panittas Red’, and ‘Pixie Dust’) and one in 2013 (on one genotype ‘Divine’) under greenhouse conditions, to test whether a model could be developed to estimate LAs of P. rubra across genotypes. Regression analysis of LA vs. L and/or W revealed several models that could be used to estimate the area of individual Plumeria leaves.To develop a model to estimate individual LA values accurately for all genotypes of P.

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The atmospheric [CO2] in which crops grow today is greater than at any point in their domestication history and represents an opportunity for positive effects on seed yield that can counteract the negative effects of greater heat and drought this century. In order to maximize yields under future atmospheric [CO2], we need to identify and study crop cultivars that respond most favorably to elevated [CO2] and understand the mechanisms contributing to their responsiveness. Soybean (Glycine max Merr.) is a widely grown oilseed crop and shows genetic variation in response to elevated [CO2].

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Вячеслав Быков, выпускник кафедры агротехнологий и экологии Таврического государственного агротехнологического университета (ТГАТУ), ведущий инженер Институт эволюционной экологии Национальной академии наук Украины рассказал о своем опыте измерения площади листьев и работе с Петиолем.

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Если вы никогда не рассматривали сорго как очень прибыльную сельскохозяйственную культуру, настало время, чтобы пересмотреть свое отношение к ней. Из разных источников, перечень которых указан под текстом этой статьи, мы собрали 8 ключевых фактов о сорго. Надеемся, что эта информация поможет Вам в принятии решений по выращиванию сорго и улучшения результатов индивидаульнои фермерской деятельности.

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Кто не садит огурцов, тот многое теряет. Ведь огурцы – это не только популярная овощная культура, но и очень ценный пищевой продукт. Плоды огурца на 95 – 97 % состоят из воды и чем выше степень зелености овоща, тем вкусовые качества огурцов лучше. Но как вырастить хороший урожай огурцов?

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