Green leaf is an important and important carrier for photosynthesis of peanuts. The size of leaf area is an important reference index and influencing factor for biomass and yield. Changes in peanut yield can be caused by changes in density, fertilization, or sowing time. In order to increase the yield, we should pay attention to the control and grasp of these aspects during the planting process. Apply the leaf area measuring instrument to measure the area of ​​the leaf area in time and do the above work to make the peanut green leaves suitable for photosynthesis.
The leaf area index is parabolic with the birth process. It develops slowly at the seedling stage. After entering the flowering needle stage, the leaf area develops faster, reaches the peak during the scab, and then slowly declines. The difference in leaf area index between different fertilization levels was significant. The treated plants grew slowly, and the growth was slow, so the leaf area index was small. The treatment had a large amount of fertilizer, although the field leaf area index was larger, but the leaves were closed and not ventilated. Impervious to light, there is premature fading of functional leaves and affects yield.
Too large or too small density is not conducive to the dynamic development of reasonable leaf area index. At a density of 165,000 plants/hm2, the highest leaf area index was 4.25, which failed to make full use of light energy and the population yield was low. When the density was 195,000 plants/hm2, the highest leaf area index measured by the leaf area meter was 5.96. And can maintain a long time, can make full use of light energy, good ventilation and light transmission, so the highest output. At a density of 21.0 thousand plants/hm2, the leaf area index at the end of the crop period reached 7.39, and then declined rapidly at the fruit ripening stage. This was due to the fact that the density was too large and the shade was severe, resulting in premature leaf decline.
For different sowing dates, the measured value of the leaf area measuring instrument in each period has a certain gap. At the same time, with the delay of the sowing date, the leaf area index will naturally decrease, but the maturity of the sowing date will be delayed. Increasingly, this is mainly due to the fact that the leaves of peanuts have basically lost their ability to photosynthesis during the mature period, and therefore the leaf area will gradually decrease.
Air Leak Tester,Pressure Leak Tester,Vacuum Leak Testing,Helium Leak Tester
Zhoushan Longwen Machinery Technology Co., Ltd. , https://www.longwenmachinery.com