The current winter wheat enters the later growth stage and is undergoing developmental processes such as grain filling maturation. Looking at the farmland and taking a look at it seems to have felt that the wheat harvest season is already hopeful, but it is expected that it is not yet available. There is still a crucial period away from the wheat harvest and we cannot relax late-stage water and fertilizer management of wheat. The grouting of winter wheat is the final critical period that determines the winter wheat harvest. As the farmer said: "The wheat is harvested for three or more, and the panicles and grains are full." Although the number of spikes in the wheat field has been established, the number of grains is not completely determined. As for grain filling or grain weight, it is precisely from this period of time. Determined by growth and development. Wheat grain filling, from the milk stage to the mature stage, should maintain a certain area of ​​green leaves to have a higher photosynthetic efficiency, at this time to properly supplement the nutrients, prevent the leaves from reducing weight due to premature aging. As for the fertilization method, soil fertilization can be used, and the technique of dressing fertilizer outside the root can also be adopted.
The principles of later water and fertilizer management
The principle of water and fertilizer management in the later period depends on the situation of wheat. It is neither necessary to top-up irrigation or irrigation, nor is it to control water and fertilizer. In view of the characteristics of fertility in the later wheat period, it is the process of grain formation, including flowering insemination, grain filling, etc. It will determine the number of grain weights and grains and play an important role in wheat yield. Since the leaves are photosynthetic products of wheat and organs for transpiration, if the leaves are too late to be senescent at a later stage, they will be detrimental to grouting; if the leaves are too lush to ripen late, it will not be conducive to high yield.
Specific measures for water and fertilizer management
The goal of water and fertilizer management is to maintain the vitality of the root system, extend the functional period of the leaves, prevent premature aging and late maturity of the glutinous green, and strive for grain weight in order to promote the movement of photosynthetic products to the grains. Take the following management measures for different wheat conditions:
1. For wheat fields whose heading color is significantly reduced in the heading stage, and where the population is not large, nitrogen fertilizer may be topdressed one at a time and water-filling water may be poured. The amount of nitrogen fertilizer should be appropriate, you can make up a small amount of nitrogen, if more will lead to late-maturing gluttony or even lodging, must be properly grasped can achieve the purpose of increasing the weight of a thousand grains and even help to maintain the number of grains. Nitrogen fertilizers may use ammonium sulfate, ammonium bicarbonate or urea. Two days ahead of time with urea. The net amount of nitrogen does not exceed 1.5-2 kg per mu.
2. For large populations of wheat fields, in order to prevent the lodging caused by the late dry hot wind, two concentrations of humic acid solution and potassium dihydrogen phosphate (0.2%-0.5%) plus urea were sprayed twice at the post-anthel filling stage. (0.5%-1%) of the mixture; can also spray silicon fertilizer and humic acid fertilizer (concentration of about 1%). Where foliar spray fertilization materials, generally have to spray 2 times, interval 4-5 days. This will not only help preserve the weight of grain, but also help prevent the lodging problem caused by dry hot air.
3. In normal wheat fields with irrigation conditions, according to soil moisture conditions, poplar water or grouting water should be timely irrigated before the peak of grain filling. This water is beneficial to the development of wheat endosperm and enlarges the skin and caryopsis, thereby increasing the reservoir capacity.
In short, the post-natal fertility of wheat flowering and grouting is of vital importance in maintaining yield. Late water and fertilizer management can not be relaxed, especially for modern high-product species, they are characterized by large potential for late-stage increase in production, and later need for more nitrogen, water and fertilizer management is the key to high-yield. However, the risk and difficulty of the management of water and fertilizer in the later period is also greater. It must be appropriate to prevent it from causing greediness or premature aging, both of which will lead to a reduction in production.
Rushan Jinguo Food Co., Ltd , https://www.jinguofood.cn