Onion convulsions caused by onion when the seedling stem diameter greater than 0.6 cm, at 2 °C ~ 5 °C under conditions of 60 to 70 days, onion can complete flower bud differentiation. When the stem diameter is more than 0.9 cm, the onion's ability to sense low temperatures increases, and the time required for vernalization to pass through is also shortened. When the outside temperature rises and the sunshine duration increases, the onion can twitch and blossom.
Different varieties have different sensibility to low temperature, and the number of days required for vernalization is not the same. Generally, the southern varieties can complete vernalization at 40°C for 60 days at 2°C~5°C, and the northern varieties need 100~130 days for vernalization at the same low temperature.
Onion sensitivity to low temperature and fertilizer, soil moisture, sunshine and other factors are also related. Conditions such as lack of fertilizer, drought and low light can easily induce differentiation of onion flower buds and lead to convulsions.
Measures to prevent the onion from convulsing in advance use the fine varieties that are strong in winter, unresponsive to cold, and resistant to twitching. This is an important measure to control early convulsions. Northern varieties should be selected as much as possible. In general, the red onions have fewer convulsions than the white onions. When introducing, it is generally not easy to introduce bolting from high latitudes to low latitudes, but it is prone to twitching from low latitudes to high latitudes.
Choosing an appropriate sowing date and planting date to select the appropriate sowing date is the most effective measure to prevent onion priming. Early sowing, seedlings before winter are likely to form large seedlings that can pass vernalization, and the rate of convulsions is high after spring. However, the seeds were too late, the seedlings were too weak, and the ability to resist cold was reduced, ultimately affecting the yield. The timely sowing, seedlings are smaller, Hunchun will not twitch.
Strictly controlling the fertilizer and water in the seedling stage before winter, it is not appropriate to apply too much fertilizer, and the thin fertilization water will make the seedlings grow robustly. For larger seedlings, control irrigation and fertilization. After the spring, strengthen the management of fertilizer and water. If there has been convulsions, the method of exhumation can be used. When the bulk of the cockroach is exposed, it can also be obtained.
Grasp the appropriate amount of seeding generally keep the single plant nutrient area in the seedbed is 4 to 5 square centimeters, to prevent the seedlings density is too large and grow thin, but also can prevent the formation of large seedlings because the nutrition area is too large.
Using hormones to control convulsions by spraying 0.25% of ethephon or 0.16% of cyanine on the seedling stage or flower buds after spraying has a certain effect on the inhibition of preconvulsions.
Bale net is a kind of plastic woven net which is used for silage bale, grass bale, hay packing, etc. Bale net is fast becoming an attractive alternative to twine for the wrapping of hay bales.
Bale net is made by the machine with the cross stitch. About raw material, bale net is made of high density polyethylene which is environmental friendly, can meet resistance requirement of the ultraviolet intensity both in Northern and Southern Hemispheres, and is suitable for all crops under all conditions.
Bale net is usually made by rolls for its convenient to put into the Bale Machine. The machine can pack the hay with bale net only, and also can pack the hay first with bale net, then pack with plastic Silage Wrap outside.
The tension of each thread of the bale net is not less than 60N (6.12KG or 13.5pounds). In each roll, the last 450 feet have 4 inches width cordon, which can remind worker to prepare the new roll in advance.
Specifications of Bale Net:
Width of bale net: 1.23m, 1.25m, 1.28m, 1.3m, 1.5m, other size can be customized.
Length of bale net: 2000m, 3000m, 3600m, other size can be customized.
Inner Core: paper core.
G/M2: 8G/M2, 9G/M2, 9.5G/M2, 10G/M2, etc.
Inner Core Size: 3``/76mm.
Color of Bale Net: White, Green edge, Blue edge, Red edge, other colors can be customized.
Package: Bale net rolls are usually packed on pallets. The pallet size can be 1.2*1.0m, 1.1*1.1m, or other size. Bale net is stacked one by one on the pallet, and then fastened by packing belt to make them stable.
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