At the present time, it is an important growth stage for the formation of grain yield at a later stage of wheat growth. Maintaining the flag leaves and the inverted leaves without premature aging, prolonging the period of green function, and maintaining a strong photosynthesis intensity play an important role in increasing grain weight. At the same time, after the flowering of wheat, the vitality of the root system began to decline, delaying root senescence and maintaining the function of roots to absorb water and nutrients, which is beneficial to increase the intensity and duration of photosynthesis of the leaves. Therefore, the wheat expert steering group of the Ministry of Agriculture proposed on the basis of earnest investigation that the main direction of current management of wheat fields is to protect the roots, preserve the leaves, prevent premature decay, increase grain weight, and focus on preventing dry hot wind, pouring slurry water, and preventing pests and diseases. Effectively, the harvest of wheat is not enough, and management will not relax during the day.
One is to prevent dry heat. In the late growth period of wheat, dry and hot wind disasters often occurred in the Huang-Huai-Hai wheat region, which resulted in the decrease of wheat grain weight and the accelerated aging of the leaves. Among the three factors of dryness, heat and wind, high temperature is the main cause of premature aging of wheat leaves, followed by relative humidity and wind speed. Dry hot air can be divided into light and heavy grades. The meteorological indicators of light dry hot air are: daily maximum temperature ≥32°C, relative humidity 14°≤30%, wind speed ≥2-3m/s; heavy dry hot air The weather indicators are: daily maximum temperature ≥ 35°C, relative humidity 14° ≤ 25%, wind speed ≥ 3m/s. It is generally believed that if there are meteorological conditions with temperature ≥30°C, relative humidity ≤30%, and wind speed ≥3m/s, dry hot air will occur. The light dry hot air will reduce the grain weight of wheat by 1-3 grams, which will reduce production by 5%-10%. Heavy dry hot wind will reduce the grain weight of wheat by 4-5 grams and reduce production by 10%-20%. Experiments in the main wheat producing areas showed that spraying 0.2%-0.3% potassium dihydrogen phosphate solution to the plants in the early and middle stages of wheat grain filling can increase the concentration of phosphorus and potassium in wheat plants, increase the viscosity of the plasminogen, and enhance plant protection. Hydraulics improve the ability of wheat to resist dry hot winds. At the same time, it can increase the photosynthetic intensity of the leaves, promote the operation of photosynthetic products, and increase the grain weight. Combining insecticides and fungicides with potassium dihydrogen phosphate (or other plant growth regulators and trace fertilizers for preventing dry hot air) can achieve “one spray and three defensesâ€, that is, one application can achieve disease prevention. , pest control, anti-dry hot wind purposes.
The second is watering paddle water. From flowering to maturity, wheat has the highest water requirement and the highest water demand, accounting for about 35% of the total water requirement. Watering at the initial stage of grain filling 10-15 days after flowering will help to prolong the functional period of the leaves and roots and maintain a higher grouting intensity. It will help lower the temperature of the wheat field, increase soil moisture, and increase the ability of wheat to resist dry hot air. But avoid watering in the windy days to prevent lodging. At the same time, for medium wheat fields with insufficient soil fertility, spraying 1%-2% urea solution at the early stage of wheat grain filling can effectively delay leaf senescence and increase grain weight.
The third is to prevent and treat pests and diseases. Stripe rust, powdery mildew, aphid, and armyworm are the most common diseases and pests in the later stage of wheat development. It is necessary to pay close attention to their occurrence and development, make predictions, guide farmers to choose the appropriate pesticide species, timing and application methods, and improve control effectiveness.
In addition, the weight of wheat reached the highest between the end of wax and the beginning of ripening. At this time, the wheat ear turned yellow, the leaves were yellow, the stem was golden, the stem sections were green, and the grain inside was waxy and could be cut off by nails. Harvest time. To catch the fine weather, harvest in time to prevent bad rain, so that particles return to the warehouse.
Best Goji procuct is in China,China is the origen of Goji Berry.Goji is a traditional,typical food in China.The majority of commercially produced goji comes from Ningxia and Xinjiang in Northwestern China, where they are grown on plantations totaling 200,000 acres.[self-published source] In Zhongning County, Ningxia, wolfberry plantations typically range between 40 and 400 hectares (100–1000 acres or 500–6000 mu) in area. As of 2005, over 10 million mu have been planted with goji in Ningxia.
Ningxia goji has been cultivated along the fertile floodplains of the Yellow River for more than 700 years and have earned a reputation throughout Asia for premium quality sometimes described commercially as "red diamonds". Government releases of annual wolfberry production, premium fruit grades, and export are based on yields from Ningxia, the region recognized with-the largest annual harvest in China, accounting for 45% of the nation's total yield of wolfberries (50,000 tons, 2013);
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