In this study,an effort was made to correlate chalky grain rate with meteorological factors during grain filling stage for Liangyoupeijiu,a widely planted two-line hybrid rice in southern China,by using data from eight experimental plots in 2006 and 2007.

Effect of population structure on the yield and chalky rice rate in hybrid rice;

It was showed:(1) The development of unchalky rice rate could be simulated with logistic model and be described with three changing phases, of which the first one was the start period for the unchalky rice to form and it sustained for about 9.

Six japonica rice varieties with different chalkiness rate in rice grains were crossed by Griffing s diallel method Ⅳ to investigate their combining ability in F 1 and F 2 generations.

Regularity of Rice Chalkiness Occurrence and its Modified Ways;

The influential factors and hereditary improvements on the chalkiness of rice grains;

Genetic Variance of Chalkiness of Different Grain Positions in a Panicle;

A study on time－dependent behavior of the North Sea unsaturated chalk;

Both the engineering practice and laboratory tests show that structural collapse in petroleum chalk tends to occur during water injection.

The characteristics between calcareous clay and chalk and marlite have been compared in mineral composition and structure etc.