The occurrence of dead seedlings has a great influence on the growth of rice seedlings, and there are many reasons for its induction. The following are common.
1 herbicide phytotoxicity
Since 2004, Sihong County has planted direct seeding rice. With the increase of planting years, the difficulty of weeding is increasing, and the number of phytotoxics caused by herbicides is increasing. The seedlings with light damage do not show symptoms, only the growth is slightly inhibited, and the growth will resume after a period of time; in most cases, the affected seedlings show whitening or yellowing, the leaves are twisted, the heart leaves can not be pumped out or the sampling is slow; In severe cases, the seedlings die in pieces. The cause of herbicide phytotoxicity is that the field is not in the ditch, the water slurry management can not be carried out according to the requirements of rice field removal; on the other hand, the long-term large amount of single drug, causing some weeds to develop resistance to different degrees, Improve the control effect, blindly increase the dosage when using herbicides. After the phytotoxicity occurs in the paddy field, it can be sprayed 1 or 3 times with the use of brassinolide, bismuth, sputum, buckwheat and water-soluble micro-fertilizer to promote the recovery of the seedlings as soon as possible.
2 diseases
The diseases that cause rice seedlings to not occur are mainly blight, nursery, flax leaf spot, and viral diseases. Blight disease can cause the roots of rice to decrease, the proportion of yellow roots and black roots is large, and the seedlings are dead and can be controlled by drugs such as nail cream and carbendazim. The nursery or flax leaf spot mainly causes brown spots in the leaves of the rice, and the plant growth is weakened. It can be controlled by tricyclazole or the like. The virus diseases mainly include stripe leaf blight and black streak dwarf disease. Stripe leaf blight mainly causes chlorosis, shrinkage and distortion, and can not be extracted. The black streaked dwarf disease mainly causes dwarfing of plants and green leaves. Short, should be combined with the prevention and control of drug-borne mediators such as Laodelphax striatellus for drug protection, such as chlorpyrifos plus morpholinium hydrochloride mixed spray. When controlling the above diseases, it can be combined with the use of brassinolide to promote the growth of seedlings and enhance disease resistance.
3 pests
The main pests causing rice seedlings are rice worms and rice locusts. The rice weevil larvae feed on the young fibrous roots of the rice, and the adult insects bite the rice near the surface of the water. After the damaged heart leaves are extracted, a horizontal row of small holes is produced, and when the rice leaves are severe, the rice leaves are broken. The rice scorpion horse sucks the sap of the rice leaves, causing the leaf tip to be slightly rolled. In severe cases, the leaves are yellow and the plants are weak. Rice weevil and rice blast can be controlled with chlorpyrifos.
4 deficiency
Commonly found are zinc deficiency, iron deficiency and potassium deficiency. Zinc deficiency mainly manifests as short stigma, new leaves grow slowly, chlorosis in the base or midrib of the heart, and the upper leaves are narrow and thin, and the middle and lower leaves are brown. In severe cases, all the leaves are brown. Iron deficiency is mainly caused by chlorosis between the veins of rice, which is streaked and leafy. The closer to the heart leaf, the more obvious the symptoms are. The plants are dwarfed, the growth is delayed, and the heart leaves cannot be drawn or even died. Potassium deficiency is mainly characterized by short stigma, yellow drooping of old leaves, narrow heart and small stems, and weak stalks. The early leaves of the old leaves are slightly dark green, and then gradually turn yellow or yellowish from the tip of the leaves along the sides of the leaves. And produce rust-colored spots of varying auburn size. In severe cases, the spots combine into strips of plaques, and gradually spread from the old leaves to the upper leaves. Finally, only a few new leaves of the whole plant remain green, and look like fire. For the field of deficiency, the trace element fertilizer should be supplemented in time, the symptoms are lightly used once, and the severe use is 2 to 3 times, once every 5 to 7 days.
(Source: Jiangsu Agricultural Science and Technology News)
Corn protein powder is the by-product of starch factory after produced corn starch. Its raw material is corn, by peeling, crashing, deslagging, and extracting starch and then concentrate, dried the yellow water to get protein products. It contains a lot of lutein that has golden color. It is good at encourage and disease-resistant for livestock and poultry. It also can deepen the egg`s color, make chicken`s skin and legs become yellow, and contain rich amino acids. It is a good additive for animal husbandry and feed industry.
Corn Gluten,Corn Maize Gluten,Maize Gluten Feed,Corn Gluten Feed Corn Bran
MIDI FEED BIOTECH LIMITED , https://www.midifeed.com