![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
Â
Nitrogen has a large impact on corn growth and yield. When the nitrogen fertilizer is insufficient at the beginning of growth, the plant grows slowly and is yellow-green. When the nitrogen fertilizer is insufficient in the long-term growth period, it is pale green, then turns yellow, while the lower leaves dry up, gradually reaching the midrib from the tip of the leaf, and finally all dry. However, excessive nitrogen fertilizer can also affect normal growth. Excessive soluble nitrogen fertilizer is applied during sowing. Once it encounters drought, it will damage the seeds, affect the germination, and the emergence and slowing of the emergence will reduce the emergence rate. In the late stage, when nitrogen nutrition is excessive, the growth is delayed, the vegetative growth is flourishing, and the seed yield is decreased. At the same time, due to the high amount of nitrogen, it promotes the synthesis of proteins and consumes a large amount of carbohydrates. Therefore, the tissue is poorly differentiated, the epidermis is incompletely developed, and it is easy to fall.
Corn is most susceptible to phosphorus deficiency in two periods. First, in the seedling stage, before the germination to the three-leaf stage, the phosphorus required for the seedlings is supplied by the seeds. When the phosphorus in the seeds is consumed, the phosphorus in the soil or fertilizer is absorbed. However, due to the short roots of the seedlings and the weak absorption capacity, the lower leaves of the leaves were dark green in this period, and then the purple color appeared from the edges. In the case of extreme phosphorus deficiency, the edge of the blade turns brown from the tip of the blade and grows more slowly thereafter. The second is the flowering stage. During the flowering period, the phosphorus in the plant begins to transfer from the leaves and stems to the seed particles. At this time, if the phosphorus is deficient, the pistil filaments are delayed and the fertilization is incomplete, and the seeds are often grown into deformed ears. However, the phosphate fertilizer should not be too much. The phosphorus-exposed corn is accelerated, and the ear formation process is soon ended. The number of grains per ear is reduced and the yield is not high.
The potassium deficiency in maize seedlings grows slowly, the stems are short, and the young leaves are yellow or brown. In the case of severe potassium deficiency, the leaf margin or tip is burnt. When the older plants are deficient in potassium, the veins turn yellow, the internodes are shortened, the roots are weak, and they are easy to fall. When the plant is deficient in potassium, the top of the ear is lacking in grain, the grain is small, and the yield is low, while the excessive potassium fertilizer has no obvious effect on the growth and yield of corn.
Total 1 | <First <Prev 1 Next> Last> |
share to:
Stainless Steel Elbows,Stainless Steel Vertical Check Valve,Non-Return Valve,Check Valve
ZHITONG PIPE VALVE TECHNOLOGY CO.,LTD , https://www.ztongvalve.com