When paddy rice is irrigated with shallow moisture, the irrigation during different growth periods is slightly different: shallow water irrigation from tiller to greening stage, moist irrigation at the early stage of tillering, field drying at the late stage of tillering, timely irrigation under jointing and booting stage, and shallow water during heading and flowering. Irrigation, wet irrigation during ripening period, wet and dry during ripening.
The return of Qingshui to the shallow water layer should be determined according to the specific circumstances. For the long-lasting seedlings, the water layer can be deeper, and vice versa. In the late stage of childbirth, it is necessary to strictly control the time and degree in order to give full play to the role of the field. It is neither too early nor too late, and too early drying will affect childbirth, and too late will affect the differentiation of young ears. The time of drying up the field should be from the late stage of the till till the differentiation of the young panicle, and the degree of drying the field depends on the field, seedlings, and the weather. At the same time, according to the conditions of the water source and the conditions of irrigation areas, the fields should be divided into fields for drying, so as to avoid drought caused by irrigation after drying and affect the growth of crops.
Rice at the heading and flowering stage at the heading and flowering stage will experience reduced production due to high temperature weather. When the summer temperature reaches 35°C, it will affect the pollination and fertilization of rice flower, and reduce the seed setting rate and 1000-grain weight. In order to prevent high temperature damage in summer, it is appropriate to deepen the irrigation water layer.
The yellow ripening period cannot be dehydrated prematurely, and dehydration can cause the soil to dry and forced mature prematurely, affecting grain filling and reducing rice yield. At the same time can not make too much water, otherwise it will cause delayed maturity, increased grain, but also not conducive to harvest. It is usually necessary to make the fields dry so that it is conducive to harvesting.
Fungi, a large class of chlorophyll - free, can not carry out photosynthesis, heterotrophic lower class of plants. These include bacteria, slime molds and fungi. Their common characteristics are: the plant body has no differentiation of roots, stems and leaves, does not contain chlorophyll and other photosynthetic pigments (except a few photosynthetic bacteria), can not carry out photosynthesis, saprophytic life or parasitic life, that is, heterotrophic life. Most of the reproductive organs are single-cell structures, and the zygotes do not develop into embryos.
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