High temperature and drought can cause soybeans to be unrealistic
The suitable temperature for soybean flowering is 25-28°C, and the suitable relative humidity is 70%-90%. If the temperature stays above 33°C for a long time, the pollen grains of the soybeans will dry out, causing poor pollination and fertilization. If soybeans continue to heat and drought during flowering and podging, the soybeans will not bloom or spend less, or they will not be able to fertilize normally.
Since July of this year, the province has experienced continuous and large-scale high-temperature weather. It has the characteristics of “long time, strong intensity, wide range, and high temperatureâ€. From July 1 to July 30, the average temperature in the area south of the Huaihe River was 30.6°C, which was 2.9°C higher than the same period of the normal year, and the highest since 1961. The average number of high temperature days in the area south of the Huaihe River was 17.5 days, which was 12.3 days more than in the same period of the normal year. It was the highest in the same period since 1961, especially in most parts of southern Jiangsu Province where it was more than 20 days, and the Suzhou Station reached 26 days. In addition, the extreme maximum temperatures of 9 stations along the south of Jiangsu have exceeded their extremum since the establishment of the station, among which Suzhou Changshu and Kunshan reached 40.2°C. The hot weather continues in early August.
Sustained high temperature and drought should be the main reason why the above-mentioned soybeans only bloom without scarring. Soybeans only appear to have no cicadas, which has nothing to do with seed quality. Judging whether the seed quality is qualified depends on whether the seed purity, cleanliness, germination rate, and moisture index are up to the standard. In addition, the improper selection of varieties, sowing too early, lack of boron and molybdenum, can also lead to only summer flowers do not scab. Improper selection of varieties, such as the introduction of spring soybean varieties from the north summer sowing, soybeans are easy to flowering early scarring, but due to lack of nutrient growth, the performance of multiple flowers only does not scar. If the summer soybeans are planted too early, sown before June 10th, and even planted at the end of May, there will be no flowering phenomenon. Soybeans are more sensitive to molybdenum and boron, and plants are seriously deficient in molybdenum or boron, which can also lead to flowering without scarring.
Since July of this year, the province has experienced continuous and large-scale high-temperature weather. It has the characteristics of “long time, strong intensity, wide range, and high temperatureâ€. From July 1 to July 30, the average temperature in the area south of the Huaihe River was 30.6°C, which was 2.9°C higher than the same period of the normal year, and the highest since 1961. The average number of high temperature days in the area south of the Huaihe River was 17.5 days, which was 12.3 days more than in the same period of the normal year. It was the highest in the same period since 1961, especially in most parts of southern Jiangsu Province where it was more than 20 days, and the Suzhou Station reached 26 days. In addition, the extreme maximum temperatures of 9 stations along the south of Jiangsu have exceeded their extremum since the establishment of the station, among which Suzhou Changshu and Kunshan reached 40.2°C. The hot weather continues in early August.
Sustained high temperature and drought should be the main reason why the above-mentioned soybeans only bloom without scarring. Soybeans only appear to have no cicadas, which has nothing to do with seed quality. Judging whether the seed quality is qualified depends on whether the seed purity, cleanliness, germination rate, and moisture index are up to the standard. In addition, the improper selection of varieties, sowing too early, lack of boron and molybdenum, can also lead to only summer flowers do not scab. Improper selection of varieties, such as the introduction of spring soybean varieties from the north summer sowing, soybeans are easy to flowering early scarring, but due to lack of nutrient growth, the performance of multiple flowers only does not scar. If the summer soybeans are planted too early, sown before June 10th, and even planted at the end of May, there will be no flowering phenomenon. Soybeans are more sensitive to molybdenum and boron, and plants are seriously deficient in molybdenum or boron, which can also lead to flowering without scarring.
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