Fine arbutus is native to the Americas and has the characteristics of rapid growth and reproduction, wide adaptability and high yield. It is an excellent aquatic feed and green manure fern. In 1976, it was introduced into China from East Germany. In 1983 Shanghang County introduced breeding, and then it was promoted throughout the county. Due to the fact that Nanyang, Tongxian, Caixi and other middle-altitude townships, the climatic conditions can satisfy the natural safety of L. lucidum overwintering and overheating. So far, L. oleifera is still generally reserved in the above-mentioned townships and rice fields. The experiments showed that the rearing of fine green arbors after the jointing stage of Waseda indica had no significant effect on the production of early rice, but there was an excess of Alfalfa left over from the field before transplanting (fast growth and reproduction of the larvae at temperatures above ≥15°C), which could easily lead to fine arbutin and early rice. The seedlings compete for space and compete for land, restraining and restricting the seedlings tiller and seedlings, and even the seedlings cover the seedlings to death. To ensure a good harvest of early rice, it is necessary to strictly control the amount of fine green arbor in the early rice field.
1 control measures
1.1 Before transplanting the seedlings after spring, the fine green ash of wintering in the paddy field can be removed from the upper and lower breeze through the shallow water layer of the wind, or it can be used on sunny days with 20% traceless (paraquat). ~ 30ml/667? The amount of water sprayed to kill 50kg.
1.2 Set a net bar at the inlet of the paddy field to prevent it from entering the paddy field with irrigation water.
1.3 After transplanting rice seedlings of the early-season rice seedlings, excessive growth and reproduction of the seedlings of the seedlings at the seedling stage should be removed manually as soon as possible. Generally, the scooping spoons that can be used in the space between seedlings and seedlings are generally used to move the fish out of the field. Herbicides should not be used to control symbiotic asparts in rice fields during the tillering period.
2 seedling management
2.1 For the sporadic winter ophiopogon or the removal of incomplete rice fields, the older (5.5 to 5.6 leaves of age) strong and shallow water layer should be selected for transplanting. The seedlings should not be transplanted and the seedlings must not be transplanted in deep water to protect the seedlings; The water layer in the field should not exceed 2cm, so that the deep leaves of the seedlings will not be covered by the shell.
2.2 After the seedlings are transplanted and returned to green, the topdressing fertilizer can be applied in time, and the combined fertilizer can be applied to the seedlings of the seedlings in combination with the seedlings in the field. Alternatively, the seedlings can be picked in the fields and the fish can be harvested. In the soil layer, the seedlings were sufficiently drained at the end of the tillering period after the emergence of the seedlings, and the cracks in the field were dropped from the field to the edge of the field, and there was a small crack in the field. The leaf color of the seedlings was obviously faded, and the leaves were significantly lifted and then irrigated in the shallow shallow water layer.
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