1. Ge, a user in Hanjiang District, Yangzhou City, asked on December 18: What herbicide should be used before sowing corn and soybean interplanting?
Yang Rongming, a researcher from Jiangsu Provincial Plant Protection and Plant Quarantine Station, replied: Methylolachlor (or metolachlor, or pendimethalin), plus thiensulfuron-methyl (or azolesulfachlor), can be used to seal and control weeds. Please refer to the label requirements for specific dosages.
2. Wang of Gaoyou City asked on December 22: The highest is minus 2 degrees, the lowest is minus 6 degrees, can wheat cause frost damage?
Professor Zhu Xinkai of Yangzhou University replied: Wheat seedlings with normal growth and leaf age of 4-6 leaves have high cold resistance and can withstand low temperatures of about minus 10 degrees, and some leaf tip frost damage may occur. Weak seedlings, damaged seedlings, and wheat fields with poor straw returning quality may have partial frost damage.
3. Yao, a user in Yizheng City, asked on December 18: When the soil moisture is moderate (but not too wet), the ultra-late sowing wheat with normal sowing depth can withstand the lowest temperature and the seeds will not be frozen and lose their vitality due to low temperature in the soil without germination and only very short buds
Professor Guo Wenshan of Yangzhou University replied: There is no accurate data on this. In the north, there is "soil covering" wheat is the situation you said, sowing seeds before winter, not freezing to death in winter, and seedlings emerge after spring. In general, spring wheat is -10 tolerant.
4. Tao, a user in Donghai County, asked on December 24: How to make wheat safely overwinter during the wintering period?
Professor Zhou Qin of Nanjing Agricultural University replied: pay attention to clearing the ditch and managing moisture during the wintering period to prevent damage, and the arid plots can be irrigated in a timely manner, and the fields with poor soil fertility and insufficient bottom fertilizer should be fertilized as appropriate. Strong seedlings sown at the right time can generally survive the winter safely.
5. Sihong County users asked on December 20: Is Cuifan soybeans suitable for planting in Sihong County, and can they be bought?
Chen Xin, a researcher at the Jiangsu Academy of Agricultural Sciences, replied: Cui fan soybean, many years ago, more than 20 years, many years ago in Sihong County at that time Taiping Township planted, the yield was OK, should be about 400-500 catties, at that time it was also called Lingzhen No. 1, there are also places called Jufeng soybean, is a fan-shaped single plant pod more varieties, generally planted more sparsely, more than 200 pods per plant, generally about 3000 per mu, there are also people planting 800 plants per mu, because the variety has more branches, the more sparse the planting, the more pods per plant are relatively more。 The new strain introduced by the Jiangsu Academy of Agricultural Sciences at that time was called Jufeng No. 1, which was an excellent single plant selected from the variety, and it did not pass the examination and approval in the provincial and regional tests. At present, some people or units are hyping up the type of variety, and it is recommended to plant cautiously, mainly for the following reasons. First, the variety has not been formally validated, and the yield cannot be guaranteed in the event of extreme weather or pests and diseases. Second, the yield of this variety is not as high as advertised, and the specific yield is subject to the planting density, management level and natural conditions, etc., and there is no and cannot reach the level of thousands of catties of beans advertised by some people. Thirdly, the variety has more branches, the stems are thicker, and it is difficult to operate with mechanization when harvesting.
6. Zhao, a user in Gaoyou City, asked on December 19: When will the cucumber greenhouse raise seedlings?
Professor Chen Xuehao of Yangzhou University replied: After the cultivation of single sheds in February, the cultivation of double-layer sheds was advanced to the beginning of February.
7. Huai'an District, Huai'an City, a user Li, asked on December 22: Laying hens have recently dropped 2 3 boxes of eggs in 190 days, and there is an obvious phenomenon of daze, what is the situation?
Tong Haibing, a researcher at the Jiangsu Provincial Institute of Poultry Science, replied: If there is no decline in food intake, red and swollen eyes, and snot shake the nose, it should be a cold stress response caused by a sudden drop in temperature. Otherwise, it's sick.
8. Zhang, a user in Huai'an District, Huai'an City, asked: At present, the weather is very cold, how to prevent respiratory diseases in cascading caged laying hens?
Professor Dai Guojun of Yangzhou University replied: In severe cold weather, we should pay attention to heat preservation, but also pay attention to ventilation in the house to prevent respiratory diseases.
9. Yixing users asked on December 23: What is the problem of Mao Juan's leaves purple?
Professor Ji Kongshu of Nanjing Forestry University replied: Brown spot disease is treated with methyl tobuzin.
10. Zhou, a user in Donghai County, asked on December 18: How to increase the yield of cut flowers in winter?
Shao Heping, a researcher at the Zhenjiang Institute of Agricultural Sciences in the hilly areas of Jiangsu, replied: It mainly depends on warming and lightening. Measures have been set up to build a good internal insulation system, including top insulation and side insulationClean the roof to ensure light transmittance;Pay attention to the temperature of the irrigation water, and warm the irrigation during the low temperature period.
11. Zheng, a user in Funing County, asked on December 19: Will the temperature drop sharply, will there be stress on the fish, and the fish that grow too fast are more obvious, right?
Wang Minghua, a senior engineer from Jiangsu Freshwater Fisheries Research Institute, replied: Add water to the pond before cooling down and maintain a certain water level.
12. Zheng, a user in Gaoyou City, asked: What are the key points of ecological breeding technology of giant river prawn?
Fu Longlong, senior engineer of Jiangsu River Crab Industry Research Center, replied: The ecological breeding technology of giant river prawn mainly includes sufficient dissolved oxygen, reasonable control of water level, aquatic weed cultivation and morphological management, rich nutrition, improvement of water quality and substrate, and refined daily management.
13. Yang of Jinhu County asked on December 11: May I ask if the lobster intensive pond is going to be planted with Yile algae. What is the reasonable density and what should I pay attention to to prevent moss?
Zhang Jiahong, a researcher at the Institute of Agricultural Sciences in Lixiahe District, Jiangsu, replied: aquatic weeds should be planted in strips, and the coverage rate of 50% of the field area should be after they growTo prevent moss, it should be fertilized and maintained at a certain water depth, and it should reach 60cm in severe winter. Winter Farming Meeting