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目前显示的是标签为“trace elements”的博文

Why does crop quality decline after continuous cropping?

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In some plants,stems and leaves appear scorching and shrinking,and some even die.Some pest structures also change.This is what the performance of continuous cropping obstacle in different crops.  The reasons are generally the following aspects: 1.Continuous cropping causes symptoms of deficiency in soil Field crops have a long reproductive cycle.The vegetable has a short growing period and a high multiple cropping index. However,whether the same crop or vegetable is grown on the same land for a long or short period,it will absorb more elements, and the element in the soil will be in short supply.Some will also lead to changes in the pH of the soil,and the availability of certain elements in the soil will also decrease.As a result, some cotton will have potassium deficiency,some cabbage will have calcium deficiency, and some will suffer from Zinc Magnesium deficiency. 2.Serious harm of pests and Pathogens in soil The common diseases in continuous cropping fields a...

Effect of trace elements on Leafy vegetables

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The significant role of plants in both cycling of trace elements and contaminating the food chain has been well illustrated for various ecosystems.  Plants can accumulate trace elements, especially heavy metals, in or on their tissues due to their great ability to adapt to variable chemical properties of the environment, thus plants are intermediate reservoirs through which trace elements from soils, and partly from waters and air, move to man and animals. Leafy vegetables are regarded as group whose leaves and stems are eaten as vegetables.They also have an abundance of vitamins and minerals within them. The primary minerals present in green vegetables are magnesium, iron, calcium, potassium, vitamins C, E and K amongst others. Studies have shown that leafy vegetables have greater potential of accumulating heavy metals in their edible parts than grain or fruit crops as fruits and seeds have low transpiration rates. (1)Celery, broccoli and cauliflower - the use of Boron will l...