The current cotton fertility has entered the peak of flowering and ringing. The bell that was formed on July 16 was a peach, and the bells before it were all in front of them. At this time, cotton is the most demanding period for fertilizer. The upper, middle and lower parts of cotton compete for nutrients, while the upper fruit branch is in the weakest position. The more the early bell hairs with lower bells, the weaker the upper fruit branch. Once it is established, it will be difficult to remedy, and it will inevitably cause the cap top peach to be small and small. This is the main reason for the unsatisfactory output of many cotton farmers in previous years, and it is also the potential for further production increase.
If you want to get more and more top peach, the upper fruit must be strong. The upper fruit branch I saw in the service to the countryside was mostly delicate, so I always stressed that applying topdressing, spraying, and flushing with available nitrogen fertilizer could not make the upper fruit branches weak. Wait until the re-discovery of defertilization in early August, which has become ill and nourishing it.
Based on observation and practice in previous years, the author proposed four criteria for judging the upper limbs:
(-) Branch thick section short. Thin and long fruit branches can't bear peach, or just peach. (b) Lei dark green. Once the yellow leaves have turned yellow, 80% will fall off. (c) The blades should not be too small. The leaves next to the buds are too small to hold big peaches. (D) can grow 2 to 3 similar buds. If there is only one bud on the branch, or if the second and the third buds are too small and too weak, it will certainly be impossible to cover the top peach.
If the upper fruit branch is found to be long and thin in mid-July, it must be combined with chemical control and make up for available nitrogen fertilizer. Urea should be the first choice, which is the highest nitrogen content, and the second is the easy absorption and utilization of cotton plants.
Currently at the top of cotton, how many fruit sticks per plant? Depends on the density. Calculated according to effective branches, it is sufficient to leave 35,000 to 40,000 per mu. Thin, yellow, and weak fruit branches, leaving no bells, are better left than they are; they prefer to stay less and not count. It is necessary to remedy the problem now and delay it later. The lesson of the empty fruit branch in previous years should be taken as a lesson.
Do not let disasters
Since July, the northern cotton region has gradually ended the previous period of high-temperature and dry weather, and has not yet entered the rainy season. It drops every other day by five drops and a light rain. The temperature is not very high and the humidity is medium and large. This kind of weather is most suitable for the breeding and outbreak of the fleas. Spray control is a must.
There are two prominent characteristics of the explosion of Fuxi: - It is very fast breeding. When conditions are right, the number of populations per day increases at double the geometric speed; second, every part of the cotton plant is damaged, including every leaf, top, young bud, corolla, cotton boll, young stem, etc. from top to bottom. Nothing was spared. Severe damage not only delayed the birth of the cotton plant, but also stopped the extension of the top and fruit branches, followed by the shedding of bells; thin varieties of the shell also made the shell stiff, cracked, and moldy and rot. Do not take it lightly.
In addition to the treatment of Fuxi, it must be treated with less cure. Wait until the cotton plants are everywhere, it is difficult to rule and the disaster will be inevitable. When spraying, it is necessary not only to add additives such as silicones, but also to emphasize the quality of spraying, so that the liquid spreads to all parts of the cotton plant, and the residual live insects are minimized after spraying.
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