Detailed Explanation of Key Wheat Cultivation and Management Techniques

SummaryWheat is prone to late spring cold spells and late frost damage in spring. Before the severe weather of heavy rain and strong winds arrives in March, wheat should be watered in time to promote a rapid rise in soil temperature and reduce the probability of frost damage. When wheat enters the green-up and jointing stage, an appropriate amount of nitrogen fertilizer can be applied as a top dressing. During the green-up stage, herbicides can be used for weed control, and an appropriate amount of paclobutrazol and similar agents can be sprayed to prevent wheat from lodging.

I. Late Spring Cold Spells and Frost Damage Prevention

1. In spring, wheat is prone to late spring cold spells and late frost damage. After the jointing stage, wheat has relatively poor cold resistance, which can affect wheat yield.

2. To avoid this situation, when wheat enters March, before severe weather arrives, such as heavy rain and strong winds, it should be watered in time. This helps the soil temperature rise quickly, and the probability of late frost damage is also reduced.

II. Fertilization Management

1. When wheat enters the green-up and jointing stage, sufficient fertilizer should be applied. At this stage, nitrogen fertilizer is mainly applied, which helps improve wheat quality and yield. If nitrogen fertilizer is applied insufficiently, wheat seedlings will grow sparsely and produce relatively few tillers, so wheat yield will not be very high.

2. If too much nitrogen fertilizer is applied as a top dressing, it easily causes excessive nutrition. Wheat will then show overly large leaves and excessive tillering, and the stems and stalks will grow relatively thin, making lodging likely and also causing yield to decline somewhat. Generally, the timing and amount of nitrogen fertilizer application for wheat should be determined according to the growth conditions of the wheat.

III. Weed Control

1. If herbicide was not applied to wheat in time before the Spring Festival, the corresponding herbicide can be applied to wheat for weed control when the weather is clear. Herbicide can be applied to wheat during the green-up stage, but once it enters the jointing stage, herbicide should no longer be applied.

2. If the timing of herbicide application is delayed, the probability of phytotoxicity is greater, and it will also cause wheat yield to decline. When applying herbicide, the dosage must be used strictly according to the instructions, and personal protective measures must also be taken during application.

IV. Lodging Resistance

1. If wheat lodges, quality and yield will decline. Wheat lodging is generally caused by sowing too much seed when planting wheat, resulting in very dense growth after tillering and thin, brittle stems and stalks. In the later growth stage of wheat, if adverse weather such as rain and wind is encountered, it can also cause wheat lodging.

2. To prevent wheat lodging, chemical growth control methods can be used for prevention during this period. Generally, an appropriate amount of paclobutrazol and similar agents can be sprayed, and the corresponding agent should be selected for control according to different conditions.