Wab181 (18 upland rice)
WAB181- 18 upland rice is a new upland rice strain bred by West Africa Rice Research Institute and stable in 1997. It was distributed to relevant countries by the Upland Rice Group of the International Rice Research Institute in the spring of 1998. The international upland rice trial observation nursery set up in Xinghua Company undertook the task of trial and observation. The characteristics and main advantages of this variety are:
1. Very precocious. Sow on May 9, harvest on August 14, and the growth period is 97 days. After trial planting and observation in 1999, it was sown on May 2 and harvested on August 6. The whole growth period was still 97 days. It was the most early-maturing variety among more than 280 upland rice varieties provided by 15 countries.
two。 The ear is big and the grain is large. Let's observe that the ear is 23 cm long and there are 178 grains per panicle. In 1999, the trial observation showed that the ear length was 27 cm, the total grains per panicle was 197, the grain was larger, the 1000-grain weight was 27-28 grams, the appearance of the husk was very dark, close to red, different from others, and could not be counterfeited.
3. The output is higher. Generally 667 square meters (1 mu) has a yield of about 350 kg and a high yield of more than 400 kg, which is rare for very precocious varieties. The growth period of planting in the north is prolonged, and the yield must be increased, which needs to be verified by northern users.
4. Resistant to drought and disease. After three years of trial, observation and breeding, it showed strong drought tolerance, good disease resistance and no common diseases such as rice blast.
5. The grain is thick and long. Although it is a large grain variety, it has white heart, small belly white, good transparency of rice quality and excellent appearance.
6. A short stalk does not lodge. After three years of trial planting and breeding, the plant height was 105 cm, 97 cm and 92 cm respectively, the average plant height was 98 cm, the stem was stout, the leaf was straight and the yield was good.
As we all know, short growth period is the greatest advantage of upland (upland) rice, which can avoid the peak period of drought and reduce the total amount of water irrigation, so WAB181-18 upland rice is a new upland rice strain worthy of introduction and development. The seed consumption of 667 square meters is 3-4 kg.
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Causes and Countermeasures of abnormal Leaf Color of Wheat seedlings
After sowing and emergence of wheat, all kinds of abnormal heterochromatic seedlings are often formed due to the influence of natural conditions and cultivation measures. In order to facilitate seedling and symptomatic management, it is introduced as follows: the causes of yellowing of wheat leaves in yellow leaf seedlings. First, the soil is dry. This kind of situation often occurs in the wheat field where the soil moisture is insufficient or the soil moisture is running away through ventilation. It is characterized by slow birth of tillers, gray-green leaves, short heart leaves, slow growth or stagnation (called by the masses as "shrinking seedlings"), yellow and dry leaves in the middle and lower parts, and few and thin roots. Tube
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Leaf color management of wheat seedlings before winter
1. The cause and management of yellow leaves of wheat seedlings: first, the soil is dry, and there are often wheat fields with insufficient soil moisture or running moisture through ventilation. It is characterized by slow birth of tillers, gray-green leaves, short heart leaves, slow growth or stagnation (called shrinking seedlings), yellow and dry leaves in the middle and lower parts, and few and thin roots. The key point of management is to apply 15kg ammonium bicarbonate per mu combined with watering. Second, due to the lack of nitrogen, the seedlings were thin and erect, the tillers decreased, the leaves were narrow and short, and the lower leaves gradually turned yellow and dry from the leaf tip and developed to the upper part. The key point of management is to use urine per mu.
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