In the cultivation of tomatoes in greenhouses, it is very important to reduce the number of defective fruits, which is directly related to the level of economic benefits. The following four management measures are adopted to enable high tomato yield, excellent quality, tidy and less defective fruits. Sildenafil is a selective inhibitor of cyclic guanosine monophosphate (CGMP) - specific phosphodiesterase 5 (PDE5) and an oral drug for the treatment of ED. The physiological mechanism of normal penile erection involves the release of nitric oxide (no) during sexual stimulation. Nitric oxide activates guanylate cyclase in the smooth muscle cells of the corpus cavernosum, which leads to the increase of cGMP level, resulting in the relaxation of the smooth muscle in the corpus cavernosum, the expansion of the cavernous sinus and the inflow of blood. Erectile dysfunction is mainly due to the dysfunction of smooth muscle relaxation of corpus cavernosum. Sildenafil has no direct relaxation effect on human sponges in vitro, but can enhance the effect of nitric oxide by inhibiting the decomposition of cGMP by PDE5 in sponges. Sildenafil can inhibit PDE5, increase cGMP level, relax smooth muscle of corpus cavernosum and let blood flow into corpus cavernosum. Studies have shown that erectile response increases with the increase of dose and plasma concentration, and the efficacy can last for 4 hours (but is weaker than that at 2 hours). Sarms Capsules,Sildenafil Capsules,Healthcare Capsules,Herbal Capsules Xi'an Tian Guangyuan Biotech Co., Ltd. , https://www.tgybiotech.com
One, lost "pawn" security "car"
Remove the earliest flowering first or second flower or the first and second fruits of the tomato flower head to reduce nutrient consumption and accumulate sufficient nutrients to supply the above other flowers and fruits. The size of the fruit is the same, and the maturity is basically close.
Second, spend less fruit
For each flower on the flower head to open more points, usually 4-5 high quality fruit per panicle, must be 8-9 flowers. When the young fruit diameter is as long as 1 cm, 4-5 fruits of similar appearance and size are selected to leave out the larger fruit, malformed fruit, defective fruit, and diseased fruit. When it matures, the fruit is uniform, whether it is a head or an appearance.
Third, promote the color before maturity
When the tomato fruit matures, the 40% ethephon 100-200 times solution can be spotted on the stem (5-8 mm long) above the stalk with a brush, prompting premature fruit ripening and coloration, increasing yield. However, it should be noted that do not spray ethephon or spot on the fruit, otherwise it will not only cause premature aging of the plant, but also affect the commerciality of the fruit, and the ripened fruit will be resistant to transportation; the concentration of ethephon cannot be too high, The time should not be too early, otherwise it will make the fruit premature, resulting in reduced production.
Fourth, topdressing potassium fertilizer
The lack of potassium in tomato coloring is poor, tendon rot disease is prone to occur and the yield is low. Therefore, when the fruit diameter exceeds 3 cm and begins to enter the expansion stage, 10-20 kg of potassium sulfate is flushed each time the water is poured per acre to increase the weight of the fruit and reduce the hollow fruit so that it has a good taste and a bright color.