The disclosure belongs to the technical field of rice planting and discloses a method for raising rice seedlings in block matrix cotton based on a walnut green peel fermentation extract. The walnut green peel fermentation extract of the disclosure is obtained by crushing and fermenting the walnut green peel, decomposing it in an alkaline environment, and extracting a water-soluble extract and an organic solvent extract, respectively. The obtained walnut green peel fermentation extract can improve the effect in soaking seeds of rice, adjust an acidity of the matrix cotton, and synergistically improve prevention and control of seed-borne diseases such as bakanae disease; and the walnut green peel fermentation extract is used to replace chemical control agents in block matrix cotton seedling raising to promote strong seedlings and root growth, which facilitates machine transplantation and improves machine transplantation efficiency.

The disclosure belongs to the technical field of rice planting and discloses a method for raising rice seedlings in block matrix cotton based on a walnut green peel fermentation extract. The walnut green peel fermentation extract of the disclosure is obtained by crushing and fermenting the walnut green peel, decomposing it in an alkaline environment, and extracting a water-soluble extract and an organic solvent extract, respectively. The obtained walnut green peel fermentation extract can improve the effect in soaking seeds of rice, adjust an acidity of the matrix cotton, and synergistically improve prevention and control of seed-borne diseases such as bakanae disease; and the walnut green peel fermentation extract is used to replace chemical control agents in block matrix cotton seedling raising to promote strong seedlings and root growth, which facilitates machine transplantation and improves machine transplantation efficiency.

To provide a brown rice quality improving agent and a method for improving quality of brown rice, with which brown rice with high quality can be provided. The brown rice quality improving agent of the present invention contains zerumbone as an active ingredient. The method for improving quality of brown rice of the present invention has a step of applying zerumbone to rice plants in the cultivation period.

To provide a brown rice quality improving agent and a method for improving quality of brown rice, with which brown rice with high quality can be provided. The brown rice quality improving agent of the present invention contains zerumbone as an active ingredient. The method for improving quality of brown rice of the present invention has a step of applying zerumbone to rice plants in the cultivation period.

A cultivation method for increasing yield of ratooning rice and reducing Cd content and use thereof, belonging to the technical field of agricultural planting. The cultivation method for increasing yield of ratooning rice and reducing Cd content comprises sowing seeds of ratooning rice in middle and late March of a year, conducting transplantation in middle April of the year for growth in a Cd-contaminated rice field, performing water and fertilizer management of a first season rice, harvesting the first season rice at a position between 1st and 2nd last nodes thereof and performing water and fertilizer management of a second season rice. The cultivation method may significantly increase the yield of ratooning rice, significantly reduce the content of Cd in brown rice of ratooning rice season, and is of great significance for the safe utilization of contaminated farmland.

A cultivation method for increasing yield of ratooning rice and reducing Cd content and use thereof, belonging to the technical field of agricultural planting. The cultivation method for increasing yield of ratooning rice and reducing Cd content comprises sowing seeds of ratooning rice in middle and late March of a year, conducting transplantation in middle April of the year for growth in a Cd-contaminated rice field, performing water and fertilizer management of a first season rice, harvesting the first season rice at a position between 1st and 2nd last nodes thereof and performing water and fertilizer management of a second season rice. The cultivation method may significantly increase the yield of ratooning rice, significantly reduce the content of Cd in brown rice of ratooning rice season, and is of great significance for the safe utilization of contaminated farmland.

A quantitative weed monitoring method guides the selection of weed prevention and control measures, and belongs to the field of plant protection. The method performs rapid and quantitative monitoring of weeds in a farmland in different farming modes in the whole growth period by using a four-level visual observation method in the seedling stage, a sampling method in the growth stage, a seven-level visual observation method in the mature stage, and a soil seed bank survey before planting, and implements a targeted weed control policy according to a quantitative index of the weeds, thereby achieving continuous prevention and control of the weeds. Through continuous monitoring, the occurrence rule and dynamic of the weeds can be determined, the weed prevention and control measures are implemented, and the usage frequency and amount of herbicides are reduced, so that the weed occurrence is controlled, and the planting costs and environmental pollution are reduced.

A quantitative weed monitoring method guides the selection of weed prevention and control measures, and belongs to the field of plant protection. The method performs rapid and quantitative monitoring of weeds in a farmland in different farming modes in the whole growth period by using a four-level visual observation method in the seedling stage, a sampling method in the growth stage, a seven-level visual observation method in the mature stage, and a soil seed bank survey before planting, and implements a targeted weed control policy according to a quantitative index of the weeds, thereby achieving continuous prevention and control of the weeds. Through continuous monitoring, the occurrence rule and dynamic of the weeds can be determined, the weed prevention and control measures are implemented, and the usage frequency and amount of herbicides are reduced, so that the weed occurrence is controlled, and the planting costs and environmental pollution are reduced.

The herbicide-tolerant rice cultivar designated CLL19 and its hybrids and derivatives are disclosed.

The present invention belongs to the field of rice seeds and discloses a composition for promoting the early harvest of rice seeds, its preparation method, and application. The composition is made from the following raw materials in mass percentage: Dihydromyricetin Extract 61.50% to 63.50%, Resveratrol Extract 6.00% to 9.00%, Vitamin C 12.00% to 16.00%, Agricultural Streptomycin Sulfate 12.00% to 16.00%. The composition is reasonably formulated, utilizing the respective effects of chemical raw materials and natural plant extracts to regulate the seed harvest period. Experimental verification has shown that the composition has a significant effect on promoting the early harvest of rice seeds. The preparation process is simple, and the composition is easy to use, providing an ideal product for promoting the early harvest of rice seeds.