31 results about "Root shoot ratio" patented technology

The invention relates to a tobacco selenium-rich seedling culturing substrate and a using method thereof. The seedling culturing substrate is characterized in a tobacco selenium-rich seedling culturing substrate, which is prepared from the steps of: mixing peat, carbonized husks, perlite and activated selenium mineral powder according to a dry weight ratio of 1:1:0.5:(0.2-0.6); adding water to achieve a water content of 20-30%; and evenly mixing. The using method of the seedling culturing substrate is characterized by comprising the steps of: spraying water on the selenium-rich seedling culturing substrate and pouring the selenium-rich seedling culturing substrate on a floating seedling culturing disk to culture seedling bases. After the substrate produced by the formula is applied for supplementing selenium of tobacco leaves, the quality of the tobacco seedling is improved remarkably, both the dry weight of a root system and a root shoot ratio are enhanced considerably, the production cost of the selenium-rich tobacco leaves is lowered effectively and the utilization rate of the selenium resource is enhanced outstandingly.

The invention relates to a method for increasing saline herbaceous plant organic carbon fixation in the arid desert region. The method includes that performing digging or drilling in plant growing areas of saline herbaceous hexinia chrysanthemum, ceratocarpus arenarius, agriophllum squarrosum or camel thorns when land surface temperature is sustained to be 20DEG C at the end of spring or herbaceous vegetation grows to 10cm; performing digging or drilling in growing season, and applying nitrate nitrogen to a dug belt or a drilled hole. Underground lateral roots of saline herbaceous plants are promoted to grow and develop by the application of nitrate nitrogen nutrition, and the plants are promoted to distribute more biomass generated through photosynthesis to the underground to promote increasing of root shoot ratio and underground root growth so as to achieve the purpose of increasing long-term storage of underground organic carbon of the plants to compensate decreasing of ecosystem carbon fixation capacity due to declining of the plants in the arid desert region.

The invention provides an older-seedling cultivation device suitable for mechanical rice transplanting and application thereof and belongs to the technical field of agricultural cultivation. The older-seedling cultivation device comprises a seedling cultivation tray, a cultivation medium and seedling cultivation paper, wherein first seedling cultivation paper, the cultivation medium layer, first nutritional seedling cultivation paper and second seedling cultivation paper are sequentially arranged in the seedling cultivation tray. The older-seedling cultivation device has the advantages that according to the fact that when seedlings are 20 days old, the height of the seedlings is smaller than that of the control, the base stem width, leaf area, chlorophyll content and overground part and root system dry weight of the seedlings are evidently increased, and root shoot ratio and root system winding force and vigor are increased evidently, the device can evidently improve seedling quality;in addition, according to the fact that when the seedlings are 30 days old, the quality of the seedlings is evidently higher than that of the control, the height of the seedlings is evidently smallerthan that of the control, and the seedlings are still suitable for mechanical rice transplanting, the device can prolong the suitable planting period of the seedlings; meanwhile, the device can reducecultivation medium use amount, save cost for farmers and increase efficiency.

The invention relates to a cold-resistant corn seed coating agent, which comprises the following components in parts by weight: 0.5-5 parts of dimethyl sulfoxide, 0.05-1 part of proline, 6 parts of 70% imidacloprid water dispersible granules, 2 parts of Arabic gum and 81.28-90.68 parts of water. The cold-resistant corn seed coating agent provided by the invention can form an active material warehouse around corn seeds, mainly used in the time period that corn seeds are sown for about one month, has the effect of cold resistance, and promotes seed germination; the germination rate and germination potential of corn seeds treated through the cold-resistant corn seed coating agent are increased, seedling dry weight is increased, the root growth in the corn seedling stage is promoted, roots are enabled to be increased and thick, the root shoot ratio and the seedling height are increased, the cold resistance of the corn seeds is improved, the corn seeds can resist cold damage, sown in the soil with moisture, can be sown early, and sprout early, the photosynthesis during the corn growth period is increased and the purposes of high yield and stable yield are achieved.

The invention discloses a microbial nitrogen-fixing bacteria, which is classified and named as Microbacterium trichothecenolyticum SPJ01, which is preserved in the China Center for Type Culture Collection, and the strain preservation number is CCTCC NO: M2016254, and the preservation date is May 9, 2016; the The application of the microbial nitrogen-fixing bacteria to provide nitrogen and phosphorus to crops in soil can alleviate the growth inhibition caused by the lack of nitrogen and phosphorus; the application of the microbial nitrogen-fixing bacteria as a nitrogen-fixing and growth-promoting bacterial agent in desert areas. It can not only alleviate the growth inhibition of crops under nitrogen and phosphorus deficiency stress, but also significantly promote the growth of crop seedlings, so that the growth indicators of the two forage grasses such as plant height, root length, single leaf area, single leaf The number, root volume, plant volume, aboveground fresh dry weight, underground fresh dry weight, plant fresh dry weight, root shoot ratio (R / T) and dry to fresh weight ratio (D / F) were significantly increased.