Harvesting crops too early or late can have a detrimental effect on yield and quality. If the harvest is too early, the seeds will not be fully matured. This will reduce the quality of the grains, reduce the grain weight, and reduce the yield. On the contrary, it will cause the seeds to fall off and reduce the harvest. Therefore, to increase the harvest, it is necessary to grasp each The best harvest time for crops is to prevent scars and falling crops and affect yield increase. Now introduce the best harvest time and identification methods for several major crops.
Millet: Millet flowering time is longer, the flowering time of a small flower on the same panicle differs by about 10 days, and the maturation period is inconsistent. The feature of the best harvest period is that when checking that the lower grain glumes in the panicle have become the inherent color of the cultivar, the glume on the back of the granules appears grayish, and when the so-called "hanging ash" is reached, the granules become hard, mature, and cut off green. This shows that the whole panicle has fully matured, regardless of its stems and leaves must be harvested and harvested.
Sorghum: The best period for harvesting is the end of wax ripening, when the accumulation of dry matter in the grains has reached the highest peak. The main characteristic is that the grains are slightly yellow, and the lower grains are milk-free when they are squeezed. At this time, more than 80% of the plants turn yellow at the base of the ear, the leaves are withered, the grains become hard and shiny, and the contents of the grains in the lower part of the ear condense into wax. The water content has dropped to about 15 to 20%. After the cut sorghum is bundled, the sorghum is spliced ​​upright so that the nutrients in the stems and leaves continue to be conveyed to the granules, which is beneficial to ripening.
Sunflower: Sunflowers have strict requirements for harvesting time. Generally, only 1.4% of the harvest is harvested during the normal maturation period. If the harvest is delayed for 5 days, the loss is 4.2%. When the back of the disk has turned yellow, the stems of the plants turn yellow, most of the leaves are brown and fall off, the stipules are brown, and the ligulate flowers fall off. When the grains harden and show the color of the species, they must be timely harvested. It is also possible to start harvesting about 36 days after the flowering period of the sunflower, when the plasticity material no longer increases, and the seed moisture content has fallen below 30%.
Gardenia: The gardenia has a long flowering time. The flowering time of the floret on the same ear is sooner or later. The maturation period is inconsistent. Generally, the grains at the top of the ear are matured first, and the grains in the middle and bottom are matured. Determine the best harvest time, mainly to see if the grains in the middle part of the ear become hard, whether it has the color of the species, and if the above two conditions are met, it can be harvested.
Rice: The harvest time is determined according to the maturity of the rice, and it is generally harvested from the late waxing stage to the early ripening stage, that is, the best harvesting period from the late September to the early October. Premature grains are not fully ripened, with many grains and blue grains. The rate of rice production is low and the quality of rice is poor. Too late, the stalks are folded, rice Nanning is thick, and the rice quality is dull. In general, when most of the leaves of rice plants turn from green to yellow, the ear of rice loses green color, the middle of the ear becomes yellow, the rice grain is full, and the grains become hard and yellow, they should be harvested.
Soybeans: premature harvest, kernels are not yet mature, protein and fat content is not high, lower oil content; late harvest, soybean meal burst, grain production fell. Generally, it can be harvested at the end of yellow ripening. At this time, more than 80% of the plants in the soybean field are dehydrated from leaves and petioles. The plants turn yellow-brown and the stems and pods turn yellow. You can hear the squeaking of the kernels by shaking the plants by hand. This shows that the grains have been rounded and hardened, showing the inherent characteristics of this species. The finished soybeans should be promptly threshed in order to prevent the growth of insect populations.
Corn: Corn should be adapted to late harvest as much as possible so that the remaining nutrients in the stem continue to be transported to the grains, increasing the material weight and increasing the yield. Therefore, it should generally be harvested at the ripening stage. Its characteristics are: yellow leaves on the base of plants, yellow and white lobe leaves loose, grains hardened and present the inherent grain type and color of this species, usually harvest before and after October 5 is appropriate.
Beet: When the sugar beet is harvested, it is generally suitable for late-harvest and high-yield varieties with longer ripening periods; for shorter-maturing standard varieties, early harvest can be appropriate; for sugar beets grown on sand and green land, It can be harvested earlier because of its maturity; beets grown on low-lying land can be harvested as late as they are ripe. In short, it will be harvested between the “cold dew†and the “frost,†which will happen around mid-October.
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