I. Problems in current fertilization
Fertilizer as an important factor to increase crop yield has been recognized by the majority of farmers, but in recent years, as the input of chemical fertilizers continues to increase, the effect of fertilizer production has become less and less obvious, and people find that fertilizer is not so "spiritual." . What are the reasons for reducing the effect of increasing chemical fertilizers? The following are summarized:
(a) The structure of fertilization is irrational and the ratio of nitrogen, phosphorus and potassium is out of balance. At present, some farmers still fertilize according to traditional experience, and there are serious blindness and randomness. At present, the proportion of nitrogen, phosphorus, and potassium input in Heilongjiang Province is 11:0.88:0.17, while the proportion of nitrogen, phosphorus, and potassium that is in line with the actual province should be 1:0.8:0.3. It can be seen that the long-term blind fertilization has resulted in a deficiency in soil nitrogen, potassium deficiency, and excess phosphorus, resulting in increased fertilization and no increase in yield, resulting in serious waste.
(b) The fertilization method is not scientific. Farmers often pay attention to the application of basic fertilizer, and rarely top-dressing, which not only reduces the use of fertilizer, but also causes the phenomenon of defertilization in the later stages of crop growth, affecting the yield of crops; regardless of seed fertilizer, fertilizer is too shallow, fertilizer is also used One of the important reasons for the low rate is that most farmers still use artificial methods to reappropriate and bury burials when applying fertilizer to crops. Although this method of fertilization saves labor and energy, it can easily cause the volatilization and leaching of fertilizers. In addition, when wheat is sown in spring, the soil is frozen only 3-5 cm, and chemical fertilizers cannot be applied at all, which inevitably reduces the utilization rate of chemical fertilizers.
(3) Trace elements have not received due attention. Because the trace elements in the soil can not be supplemented for a long time, their contents can no longer meet the growth needs of the crops. According to the “least nutrient theoryâ€, even if the proportion of nitrogen, phosphorus, and potassium is applied properly, the yield of crops will be affected.
Second, an effective way to increase the utilization rate of chemical fertilizers
Fertilizer input and utilization is one of the important signs of agricultural modernization. At present, China's fertilizer utilization rate is only 35%, while Heilongjiang Province is only 30%, and twice as low as developed countries. The current level of fertilization is 5 million standard tons. If the utilization rate of chemical fertilizers is increased by 10%, it is equivalent to an increase of 500,000 tons of fertilizer, which is equivalent to the output of a medium-sized fertilizer plant. The economic and social benefits are very significant. So how can we increase fertilizer utilization?
(A) vigorously promote formula fertilization technology. According to the crop's fertilizer requirement law, soil test results, and fertilizer utilization rate, the reasonable amount and proportion of nitrogen, phosphorus, potassium, and trace elements are adjusted so that the crop can be fully and reasonably supplied with nutrients and the potential for crop yield increase can be maximized. Improve economic efficiency.
(B) to improve overall fertilization methods. According to the law of fertilizer demand of crops, fertilization is reasonably applied in stages at all stages of crop growth to meet the nutrient supply during the whole growth period of crops and achieve the purpose of economic fertilization; in addition, autumn fertilization and deep fertilization should be strongly promoted, and wheat can be reached through autumn fertilization. Deeply applied, corn and potatoes reach deep through shaving and top dressing, and soybeans use precision jukeboxes to reach deeper applications. Through autumn fertilization and deep fertilization, the loss of fertilizer is minimized, thereby increasing the utilization rate of chemical fertilizers.
(C) fertilizer, organic fertilizer application. In addition to nitrogen, phosphorus, potassium and various trace elements, organic fertilizers also contain a large number of beneficial microorganisms and organic colloids, which have important functions such as soil improvement and fertilizer conservation, and can make up for the single nutrient caused by single application of chemical fertilizers and are easily affected. Due to the disadvantages of fixed soil and easy leaching, the loss of chemical fertilizers is small, and it is beneficial to increase the utilization rate of chemical fertilizers.
(D) Other ways to increase fertilizer utilization.
1 see soil fertilization. Such as: sand soil. Due to the serious leakage of water, the fertilization method of “eat less meals†should be adopted.
2 Do not mix ammonium nitrogen fertilizer with alkaline fertilizer. Alkaline fertilizers such as grass ash, lime, and kiln ash can not be mixed with ammonium nitrogen fertilizers such as ammonium sulfate, ammonium chloride, liquid ammonia, etc. Otherwise, mixing will cause loss of nitrogen volatilization and reduce fertilizer efficiency.
3 After urea is applied, it is not suitable to water immediately, nor is it easy to apply before heavy rain, otherwise, urea can easily be lost with water.
4 Avoid using fertilizers such as urea, ammonium chloride, and potassium nitrate to poison and corrode seeds, so as not to affect seed germination and cause seedling deficiency.
There are many kinds of tea products in China. They are particular about color, aroma, taste and shape, so they need a series of instruments that can give full play to the characteristics of all kinds of tea leaves. This makes the Tea Set in China differents amd importance. What modern people call " tea set " . Basically point to tea cup, teapot, tea bowl, tea coaster, tea tray to drink for tea appliance, because the material and the place of origin different,Tea set divide into pottery soil tea set, China tea set, lacquer tea set, Glass Tea Set, metal tea set and bamboo wood tea set and so on.
Joy Tea Co.,LTD. has a professional design team, which can be customized for you. Welcome you to visit our company. For inqury, please send mail directly.
Tea Set
Tea Set,Glass Tea Set,White Tea Set ,Ceramic Tea Set
JOY TEA CO., LTD. , https://www.joyteaco.com