Best harvest time for wheat
The maturity of wheat can be generally divided into three stages: milk ripe, wax cooked and ripe (also known as yellow ripe).
1. The stage of milk maturity is from the beginning of wheat flowering pollination to the end of the filling, and most of the substances stored in the grain are accumulated during this period. The grain characteristics at the end of the milk ripening period are: the back of the grain is gradually green, the yellowish green is turned, the ventral groove is green, and the emulsion inside the grain is concentrated, but it can still be extruded. The embryo has the ability to germinate, and it can also grow normally after germination. The middle part of the awn becomes yellow; the outer part begins to grow, and the plant is still green. The 1000-grain weight of the seeds at the end of the milk ripening has reached more than 80% of the maximum dry weight.
2. This stage of wax maturity can be divided into the early, middle and end stages of wax ripening. The initial performance of the wax is: the back of the grain is yellowish white, the groin is yellow-green, and the grain of the grain is easily broken by the nails. The contents of the grain are waxy and can be smashed into strips. The upper part of the glum and the neck of the ear turn yellow. Most of the leaves begin to turn yellow. Only the top 1 to 2 leaves are still green. The middle stage of the wax is: the whole grain is yellow, soft and elastic, and it is easy to break the grain with the fingernail. The 1000-grain weight approaches or reaches the maximum value, the top of the stem becomes yellow, and the base of the glume remains green. The beginning of the awning, the straw is still elastic; the performance of the wax at the end of the period is: the plant is all yellow, the stalk still maintains a certain elasticity, the shape and color of the grain are the same as the characteristics of the original variety, and the nails of the original are used. It is not easy to trace, and the 1000-grain weight reaches the maximum. During the whole wax ripening period, the nitrogenous substances and soluble carbohydrates of the plants continue to be transported from the stems and leaves to the kernels. It does not stop until the end of waxing, during which the water content of the grain has dropped to 20-30%.
3. The main feature of this stage of ripening (also known as yellow ripening period) is that the plant has no dry matter accumulation, the straw gradually loses its elasticity, and the ear begins to tilt. The grain water content is further reduced, while the 1000-grain weight is slightly lower than the highest value.
In view of the performance of three different maturity stages of wheat, it can be seen that the mid-term and end-time of the waxy period of wheat is the best harvest period, because this is the period of maintaining the highest grain yield and the best quality of wheat. In this most suitable harvest period, harvesting should be done sooner rather than later. As the saying goes: wheat is cooked, eight mature, and ten percent. If the harvest is delayed until the ripening period, in addition to the loss of grain germination caused by frequent granulation, ear loss or rain, it may also be stored in the grain due to the action of respiration, leaching, etc. under high temperature and rainy conditions. The material is depleted, reduces the yield, affects the quality, and causes serious downfall. The test proves that the wheat harvest in the ripening period can be reduced by about 23% compared with the wax ripening period, and the starch and protein content are reduced by about 5%. Conversely, premature harvesting, soluble substances in stems and leaves can not continue to enter the grain, but the grain filling is not sufficient, resulting in insufficient grain, resulting in reduced yield, resulting in serious scars. Therefore, the best harvest period of wheat should be selected in the middle and end of the wax maturity period, so as to ensure that the particles are returned to the warehouse and the harvest is high.
Frozen Shrimp,Vannamei Shrimp,Vannamei White Shrimp,Seafood Frozen White Shrimp
Zhejiang Zhoushan Jiaze Aquatic Co., Ltd. , https://www.tianjia-aquatics.com