The reason of peanut shell and preventive measures

In recent years, the high shell rate of peanuts directly affects the output and quality of peanuts. Recently, farmers have also consulted on the problem of empty shells. The main reasons for the production of empty shells for peanuts and their preventive measures are described below:

First, the cause of the peanut shell

1. Related to the variety. Generally large peanut series easily produce empty shells, while small peanuts pearl series rarely appear empty shells.

2. Insufficient calcium. Peanut shell is mainly caused by calcium deficiency. After calcium deficiency, the development of pods is poor, affecting the development of kernels and forming empty shells. The causes of calcium deficiency in peanuts are as follows: (1) Soil factors. One is the lack of organic fertilizer in the soil, but do not pay attention to calcium fertilizer application, resulting in calcium in the soil, causing calcium deficiency. The second is the acidic or acidic soils such as red soil and yellow brown soil. The active calcium contained is generally low, showing calcium deficiency. (2) Climate factors. High temperature and rain cause loss of calcium in the soil. Drought or water in the soil can impede the absorption and utilization of calcium in the root system. (3) Excessive potassium. Excessive application of potash will affect the absorption and utilization of calcium in the roots, resulting in calcium deficiency in peanuts. (4) Calcium deficiency in the fruit layer. Peanuts are hi-calcium, and their ability to absorb calcium in roots is limited. Especially after the flowering period, a large amount of calcium needed for the growth and development of peanut pods mainly depends on the absorption of calcium from the soil by the fruit and young fruit itself. Therefore, after the needle is in the crusting stage, even if the underlying soil layer in the root system is not deficient in calcium, the lack of calcium or insufficient calcium in the layer of soil where the fruit is located will also affect the formation of pods, resulting in the empty shell of the peanut.

3. Boron deficiency. The lack of boron in peanuts delays flowering, affecting the formation of pods and kernels, resulting in empty shells of peanuts.

4. Phosphorus deficiency. Peanuts lack phosphorus, dark green leaves, thin stalks, fewer nodules, less flowers and differentiation, obstructed fruit development, easy to appear empty shell.

5. Too much nitrogen fertilizer. In order to increase yields, some farmers are blindly adding nitrogen fertilizers instead of phosphorus, potash, and organic fertilizers. This is not conducive to nitrogen fixation in root nodules, but it also leads to long-term growth of the shoots, resulting in overgrowth of stems and leaves in the ground and undernutrition in the underground. Empty shell.

Second, preventive measures

1. Reapply organic fertilizer. The comprehensive nutrition of organic fertilizer can make peanuts fully nutritionally supplemented. General Mushi rotten organic fertilizer 3000-4000 kg base fertilizer.

2. Increase calcium fertilizer. In general, 30-40 kg of superphosphate is applied as basal fertilizer, and 25 kg of gypsum (calcium sulfate) can also be applied at the flowering stage per acre.

3. Spray boron fertilizer. Sandy soils and severe soils deficient in boron can apply about 1 kilogram of borax per acre, which can be used as a base fertilizer or as a seed fertilizer. In general, 0.2%-0.3% borax solution can be used for extra-root fertilizer application 2-3 times.

4. Deep application of potassium fertilizer. Potassium fertilizer should be applied deep below the result layer to prevent the result layer from containing too much potassium, affect its absorption of calcium, increase empty fruit and rotten fruit.

5. Timely irrigation and drainage. Timely watering to prevent drought, in case of rainy water, should be promptly drained, so as not to affect the absorption of calcium in the roots, resulting in peanut shell.

Valve Spindle

It is full range of valve spindle for the following type :

Valve Spindle,Spindle Butterfly Valve,Marine Valve Spindle,Valve Extension Spindle

ZhouShan HeCheng Machinery Co., LTD. , https://www.hcmarineparts.com