The main reasons for rice cracking:

1, genetic characteristics of varieties. According to research, chalky white is controlled by a single gene, straight-chain starch content is controlled by a pair of main effect genes, high straight-chain starch to low straight-chain starch is controlled by multiple genes, gel consistency is controlled by a single dominant gene or a pair of main effect genes and a number of microeffective genes, pasteurization temperature is controlled by 1 to 2 main genes or multiple genes, and so on.

2, environmental conditions. In particular, the temperature and light during the period of grouting and fruiting after spiking have a greater impact on the quality of rice, such as high temperatures can make the brown rice rate, the rate of refined rice decreased by 1 to 3 percentage points, and the rate of whole refined rice decreased by 3 to 10 percentage points or even more, and increase the rate of chalky grains and chalky whiteness, and increase the protein content. The content of straight chain starch and cooking flavor quality also has a great impact.

3, cultivation measures. Such as sowing and planting period, planting density, fertilizer application, irrigation, pesticide application, harvesting period and processing conditions have a certain impact on the quality of rice.

How to cultivate a good quality of rice

1, different rice varieties of different genes, determines the grain shape of rice, starch properties, flavor quality, nutritional quality differences and cultivation technical measures required. Generally speaking, palatability better rice varieties are generally rice crystal clear, and this is mainly affected by the genetic factors of rice. Even if the same rice variety, if the cultivation conditions have changed, the traits of its rice will be affected, so only in the appropriate conditions, high-quality rice can produce high-quality rice.

2, in general, limestone soil cultivated out of the poor quality of rice, and alluvial soil or sandy loam has a better quality of rice cultivation, at the same time, the soil can not be polluted, the content of organic matter should be maintained at 2% or more, the soil should be weakly acidic, to ensure that the nutrient elements in the soil is more perfect.