Reasons why elements in the soil cannot be absorbed
The element was originally contained in the soil, but for various reasons the plant could not absorb it. The details are as follows: i. Drought: When there is no water, the element cannot become soluble or ionic state, and the roots cannot absorb it. Therefore, deficiency mostly occurs in dry years or dry seasons. Second, soil reaction (ph) discomfort: soil reaction strongly affects the solubility of nutrients, i.e., effectiveness. Some elements are easily soluble under acidic conditions, with high effectiveness and validity, and the solubility - effectiveness decreases when the reaction tends to be neutral or alkaline. Other elements are the opposite, with high effectiveness under alkaline conditions and low effectiveness under acidic conditions. With the reaction
Difference between bacterial diseases, fungal diseases and viral diseases
1, fungal diseases Diseases caused by fungi can show spots, wilting, deformities and other disease symptoms. But bacterial diseases can also cause the same symptoms, the difference is mainly in the fungal diseases in the onset of the site can see spidery or flocculent mycelium, some have nuclei and other mycelium metamorphosis. In the onset of the site surface growth of a variety of mold, which is an important feature to identify fungal diseases. All fungal diseases, no matter what part of the occurrence, symptom performance, in wet conditions have mycelium, spores produced. This is the main basis for determining fungal diseases. For example, cucumber powdery mildew, the leaf spots appear white
The rice plague disease alias fire plague, plague, plague also, the horror, not yet Ebola horror. This disease is also one of the three friends of rice diseases, just like the three friends of plum, orchid and chrysanthemum. The degree of harm caused by this disease varies depending on the variety of rice, cultivation techniques as well as climatic conditions, and this phrase is usually said by experts to run train words. Xiao Li parrots the words a little. This disease epidemic year rice yield reduction of 10% to 15% in general, heavy up to 30% to 50%. Horror, right? Early indica rice has less incidence, (indica rice is the basic type of rice, generally grown at low altitudes and in hot and humid areas.) Late rice incidence more, especially japonica, glutinous rice more prone to disease, along the river, coastal areas perennial occurrence of serious, often causing serious harm (japonica rice is a rice variant, planted at high altitudes, intolerant of high temperatures, glutinous rice is the glutinous rice wine we drink, the boss to two cups of that)
Sing a song with you, please listen to it for me. The bell and drums are not expensive, but I hope that long drunkenness does not wake up, the ancient sages are lonely, but there are drinkers to stay its name. Ha ha, you heard it right is Li Bai, but today the village chief Xiaoli not Kan Li Bai nor Kan Du Fu, only Kan Kan we Road Qu disease. Because there is a Qu word, suddenly remembered the old grandfather Li Bai, incidentally, to remember him, is not also seem us a little sentiment. Back to the topic, rice qu disease, also known as false black disease, green black disease, green powder disease and so on. This disease usually occurs on late rice, glutinous rice and hybrid japonica rice incidence is higher than other varieties, we hear the hybrid is not to think of foreigners, yes this disease is really the introduction of new varieties before the big release, so the foreign moon is not necessarily round Oh. Rice is mostly susceptible to the disease at the spike and flowering stage, forming a spike disease, and depending on the variety, climatic conditions and fertilizer management and other conditions, there are significant differences in the degree of incidence between rice fields, thus affecting the yield. In some years, the disease occurs severely on individual varieties, with a serious incidence of up to 60% or more, with 1~5 grains per spike, and up to 20~30 grains per spike resulting in large yield losses. This disease is a fungal disease, mostly occurring in good years of rice harvest, farmers mistakenly believe that it is a sign of a good year, so there is a "harvest fruit" commonly known.
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Copyright © Kaifeng Dadi Agrochemical Biotechnology Co., Ltd.
Powered by www.300.cn Business license SEO
This website supports IPV6