recently, many vegetable growers reflect that the growth of plants is weak, but the effect of fertilizer application is not good. technicians found that in the production of greenhouses, vegetable farmers often go into such a misunderstanding that the weaker the plant growth, the more fertilizer they use. in fact, there are many reasons for the weak growth of plants, and the lack of fertilizer is only one of them. if vegetable farmers do not analyze the specific reasons, but only blindly supplement fertilizer, it will only cause the concentration of fertilizer solution in the soil to become higher and higher, accumulated to a certain extent, vegetables will burn roots, but will cause the trees to become weaker and weaker.
this reminds vegetable farmers that when they find that the plants are too weak and slow to grow, they must carefully analyze the causes, and then treat symptoms is the best policy. so, besides the lack of fertilizer, what other reasons can cause the weak growth of plants?
reason 1: too many fruits and too much nutrient consumption of plants
in the process of planting management, many vegetable farmers always try to retain as many fruits as possible. often, because of excessive fruit retention and excessive plant load, the vegetative growth of plants is weakened. in this case, proper fertilization is necessary, but it can not solve the fundamental problem. because the plant's ability to absorb fertilizer is limited, not how much fertilizer it can absorb.
that is to say, the amount of fertilizer applied does not necessarily provide much fruit. too much fertilization will only result in waste or burning roots. if this happens, the most effective way is to reduce fruit load, so as to accelerate the vegetative growth of plants, in order to achieve the goal of turning from weak to strong.
reason 2: leaf thinning is excessive and photosynthetic nutrient supply is insufficient
when vegetable growers sparse leaves, if the sparse leaves are excessive, the photosynthetic nutrients produced by leaves can not meet the growth of plants and fruits, the growth of plants will be weakened. especially for vegetable farmers who grow tomatoes, this problem often occurs. in order to promote fruit color change, a large number of thinning leaves are often carried out.
if this is the case, it will not be helpful to supplement it, because the plant is not short of fertilizer at all. therefore, in order to solve this problem, only reasonable sparse leaves and leaves, to provide adequate photosynthetic nutrition for plants is the key.
reasons 3: root system injury, absorption capacity blocked
another reason is that the root system of the plant is damaged. when the root system of the plant is damaged by retting, burning and other reasons, the ability to absorb nutrients will be weakened, and the plant will become very weak. in this case, blind fertilization can only be counterproductive. the correct solution is to treat root injuries in time. for example, drain water and reduce humidity in time after rooting, raise ground temperature and hoe timely. burning roots can reduce the concentration of fertilizer solution in soil by increasing irrigation water appropriately.
cause 4: soil salinization is too heavy
at present, there are many problems in the fertilizer use habits in some places, such as the use of chemical fertilizers in large quantities at the bottom, the amount per mu far exceeding the growth requirements of vegetables, the use of manure without fermentation and maturation, resulting in the increasing concentration of soil solution, the increase of soil salinization. in recent years, the appearance of white, red, green crystals or moss on the surface of the soil is the prominent manifestation of soil salinization.
the ability of vegetable roots to absorb water and nutrients is greatly affected. vegetables have been "underfed". how can they grow well? if chemical fertilizer is applied at this time, the concentration of soil solution will continue to increase, which will make it more difficult for plants to absorb water and fertilizer, and the growth of plants will become weaker and weaker.
to solve this problem, we should first reduce or even suspend the use of chemical fertilizers, so as to improve the soil and reduce salinization. secondly, when spraying fertilizers, it is necessary to mix microbial agents with water-soluble fertilizers in turn.