The base of the wheat is too long to prevent lodging

Shui Qing: Through chemical control measures, the short and thick internodes of the wheat seedlings are not afraid of later lodging. Can you peel off the main stem of a typical wheat plant? Pick a seedling and lay it on the ground to take a photo. Take one of them and sort out the leaves of the main stem in order. Take a photo flat on the ground and try to see the change in the length of the top five leaves of the main stem. Peel off the main stem and draw long stem sections of the leaves, expose the stem sections, take a picture, to be able to see the changes in the length of each section.

Sword: OK.

Clear water: From the picture, the young ear should be the main stem, and when it is drawn in the third, it just grows. The first and second draws are a little longer. This wheat was controlled with paclobutrazol before jointing?

Sword: The wheat was sown on November 16. Use 50 grams of 15% paclobutrazol per acre before jointing. At the end of February, 30 grams of 30% benzoylzinc were used per acre. On March 19, 25 grams of 43% tebuconazole was used per acre.

Shui Qing: The first quarter of the base of the young wheat was green and completely shaped. The second quarter is still a bit bleak, but it won't grow much; the third quarter will last longer. The use of inhibitors at this time does not have much influence on the elongation of the main stem in the third internode, it controls the fourth internode of the main stem, and it also controls the third internode of the tiller, but it also affects Spike development. The base of the stem is discolored in the picture, is it a residual sheath, or is the stem browned? The base of the stem is like a sheath blight that infects the stem. Disease development can cause white spikes, but it is difficult to control it now.

Sword: The browning of stems of wheat seedlings is caused by frost damage in spring. Before the field was frozen, broad-leaf weeds were destroyed by 2A 4 -chloro and fluoxyl. This is a photo of wheat seedlings at the time. In order to promote the growth of wheat seedlings, some conditioners were sprayed and some fertilizer was applied. The green particles on the surface were sprinkling fertilizers. After the rescue measures were taken, the wheat seedlings soon resumed growth. At present, the overall situation is not bad, except that some wheat seedlings suffered minor or no damage at the time, and it was difficult to distinguish and control them by using large-scale mechanical spraying spray regulators and spreading manure fertilizers. The wheat seedlings in these areas are flourishing.

Clear water: frost damage can easily cause stem rot. After the drug was used in the previous period, the problem of not expanding the lesion was not significant. The fields are wet and there is moss on the ground. If the ditch is not smooth, you can consider cleaning up the ditch and doing partial management. I do not quite agree with the current use of regulators to control the growth of wheat seedlings.

What is the estimated number of effective panicles in the field? There are no small joints that are jointed or the degenerative leaves that have yellowed leaves do not count. The fields looked dense, mainly with large leaves. Compared with drape, the number of effective stems should not be much. You can check it out. The base of the young wheat seedling is very refreshing and there is no disease, so don't worry too much.

Sword: The effective ear per mu is about 400,000. 3.6 meters of glutinous rice noodles broadcast 20 rows of 110 spikes per metre.

Shuiqing: The grain structure of Zhenmai 168 is an average of 336,000 spikes per acre, 35.1 grains per ear and 40.4 grams of 1,000 grain weight. There are a little more than 400,000 per mu. Zhenmai 168 has an average height of 85 cm. The length of the three internodes in the base has reached about 20 cm, and will increase again. With the fourth and fifth quarters, the height of the wheat plant will be higher.

Sword: When the number of panicles per mu increases, the number of grains per panicle will decrease. I have been performing all the years in the cultivation of Zhenmai 168. The 1000-grain weight is generally not less than 45 grams and the bulk density is 820 grams/liter.

Shui Qing: I came to seek advice from Professor Jiang Dong, a wheat cultivation expert at Nanjing Agricultural University.

Jiang Dong: From the picture, the wheat seedlings group is indeed a bit large, and invalid childbirth has begun to die. If the previous fertilizer application is large, you can consider controlling it. Plant growth inhibitors spray better when they are used for pumping 4 leaves. Now the last leaf of the young wheat seedlings will be pumped immediately, and the basic internodes have been set for a certain length. Spraying growth inhibitors has no control over these internodes. Can take into account the discretion of the break period control. If it is found that the population is still large, it is possible to spray Jinfenggude, shorten the length of internodes under the ear, reduce the center of gravity of the plant, and improve the lodging resistance to a certain extent. Dafeng and other places have large winds during the grain filling period, and it is best to control them when the groups are large.

Clear water: Yes, there is a lot of wind. I once saw the poplars on the roadside in the wheat mature period have been stopped and blown away. I would like to solicit the opinions of Zhenai Chen, a researcher from Zhenmai 168.

Chen Aida: From the photos, the first internodes of the stems of wheat seedlings are long and the second internodes are too long, especially due to ineffective delivery. The base of the seedlings is covered with thin stems and tender stems; the leaf color and plant height of wheat seedlings are normal. Young ears are larger. Wheat is about to enter the booting stage and will enter the heading stage in mid-April. Soil moisture is high and humidity is high. Cultivation management should be considered to clean up the ditch, reduce soil moisture, speed up the disappearance of ineffective delivery, improve the ventilation and light conditions of the base, improve the mechanical strength of the stalk, and enhance lodging resistance.

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