The wheat planting is done under the conditions of drought during the sowing period. In order to catch the planting period, try to catch the seedlings as early as possible and sow the seedlings early after the rain. Soak the wheat seeds to the field soil that can't emerge, and wait for the rain to emerge. This is a drought-resistant planting strain measure that has been proved to be relatively successful in production practice. According to investigations in 1992 in the counties of Luoyang City, two different sowing methods were used for sowing seeds and sowing after sowing. Increase production by 49.4%.
This year, most counties (cities) in the western part of Henan Province in Henan Province have experienced long-term persistent droughts that have not been encountered for many years. Take Jingxian County as an example, on October 14th, the absolute soil moisture content in 0-20cm soil layers was measured. 5.00%, relative water content 19.59%: 20-40cm soil layer absolute water content 9.38%, relative water content 37.88%. Severe drought. The county's 260,000 hectares of dryland wheat fields, as of October 20 drought seeding less than 10,000 acres, there are no tens of thousands of acres, about 50,000 acres did not also site preparation. The people have ideological concerns about the drought and planting, and fear that the small amount of rainfall after planting will bring back bad shoots, so they want to wait until the rain falls and then sow.
Practice has proved that after sowing, the seeds of wheat germinate and germinate and cannot emerge in time, and they also have strong drought tolerance. I personally had done the water cut test after germination of the wheat seeds first. The wheat seeds were first germinated. When the shoot length was 5 mm, the germinating seeds were buried in three pots with dry soil and sown to a depth of 4 cm. Every 7 days, 50 germinated seeds were removed from each flowerpot and immersed in wet sand. When the seedling height was 4-5 cm, the seedling rate was calculated. Absolute water content in soils above 5 cm falls below 3.6%. Absolute water content below 5 cm falls below 5.25%. After 42 days of water cutoff, the survival rate after water culture can be maintained above 98.67%, water shortage for 86 days, and water supply training. After the survival rate can still reach 90%. This shows that the seeds of wheat are very resistant to drought after germination and germination, as long as they are not the quality of the seeds themselves, they generally do not appear to have a bad phenomenon. We hope that the peasant friends will lift their concerns and boldly plant their seeds.
Now we have arrived at the lower limit of the suitable sowing date for spring wheat cultivars. According to past investigations, the suitable sowing date for wheat was exceeded, and sowing every night for one day, and the yield was reduced by more than 10 kg. According to the weather forecast of 2345, there was heavy rain on October 28 in Lixian County and moderate rain on the 31st. It is suggested that the farmers' friends have already fully and firmly planted seeds. There is no land for planting and cultivating and cultivating the land. In order to prevent seedlings from being planted after raining and delaying seedlings, serious reductions in production are caused.
The following three points should be noted in wheat seeding technology:
1. The suitable sowing date for semi-wintering wheat cultivars has already passed. It is now possible to plant seedlings and emerge after rainfall, and it should be replaced with spring and spring varieties.
2, due to sowing seedlings later, to the main stem into the panicle, the amount of sowing should be increased, sowing 13-15 kg per mu. And the seeds have to be carefully selected to remove lean, insects, and broken grains.
3, in order to achieve early emergence, sowing should not be too deep, depth 3-4 cm is appropriate.
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