At present, there are many places in the booting and heading period of wheat in various places, and this period is not only the period of watering for the second time, but also the critical period for the second package of increasing yield, and the second time of water and the second package of increasing yield overlap, whether it is watering first or hitting the package first? On this issue, everyone also holds different views and viewpoints, some people think that it is better to water first, otherwise it is difficult to prevent and control the disease, and some people think that it is better to water first, otherwise the drought will affect the booting of wheat and cause grains.
We have to look at the field moisture and seedling growth, if the field 5~10 cm soil can be held into a clump, indicating that the field moisture can be, this situation should be sprayed in time for the second time to increase the yield package, and then watered. Because the wheat flag period is the period when all leaves are fully expanded, and it is also the period when the ability to absorb the liquid is the strongest, if the humidity in the field increases after watering, it is likely to be infected with diseases during this period, so the field is not particularly dry to spray first, and then watering after three to five days after spraying, after all, there is enough water to transport the liquid medicine and nutrients.
If the field is watered relatively early, and there is already a shortage of water and drought in the field at this time, in this case, it is necessary to water first, and then spray the second batch of yield increase package after watering (if it can enter the ground).
In short, spraying or watering first must depend on the moisture in the field, as long as the moisture is good, spray the first prevention, because there is enough water in the field to transport the liquid medicine and nutrients. On the contrary, if there is a shortage of water and drought in the field, it is undoubtedly necessary to water first and then spray.
It is recommended to spray before flowering or sporadic before flowering, because wheat can not determine the number of grains per spike after flowering, so we must grasp the period. Generally, for most plots, as long as the field is not dry, hurry up to spray the second time to increase the yield package, and spraying in advance also has a protective effect on the leaves, preventing diseases and insects, supplementing nutrients, and escorting the harvest and yield in the later period.
Normally, wheat should be sprayed three times in a lifetime, if wheat is going to be sprayed only once, then do not miss this period (before flowering) because this period is the key period to determine the number of grains per ear of wheat and the weight of 1000 grains, do a good job of wheat yield to improve the yield of great help, but also for the later flowering and filling to provide sufficient energy.
At the same time, spraying the second time yield increase package can also delay root senescence, protect flag leaves and inverted two leaves, because 90% of the yield of wheat is completed in the later stage by flag leaves and inverted two leaves, these two leaves are closest to the wheat ears, and the nutrients it produces can also be delivered to the wheat ears the fastest, so the second time the yield increase package is recommended to choose high-end and relatively large energy, sufficient nutrients, and large energy to have more large ears of wheat.
To sum up, there is no standard for which of the second water and the second yield increase package of wheat is first, and it must be decided according to the moisture in the field. In addition, whether it is watering or spraying, it is best to choose to carry out before flowering or sporadic flowering, and do not spray or water during the flowering period, otherwise it will have a certain impact on the yield. If you have to water and spray during the flowering period due to various factors, you can avoid the flowering period and choose to do it in the afternoon. Finally, I have to remind everyone that watering during the flowering period should pay attention to the weather conditions, and sprinkler irrigation should not be carried out.
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