Comparative Study On Yield And Quality Of Different Yield Levels Rice In Heilongjiang Province Saline Land

Currently, the research on distribution of yield and quality of rice in Heilongjiang Provincewas less，had not been reported in saline land. Adopted randomized block design，theexperiments were conducted by using93rice cultivars as materials in Wangjiaweizi paddybase of Daqing,to clear yield and quality traits, relationship of protein components and qualityin different yield index, to provide the basis for application and parental choice of high yieldand quality rice in saline land. The results indicated that：1. Under saline land conditions, the yield of the test material was average4501.21kg/hm2, normal distribution. The study was in accordance with euclidean distance, using the groupaverage method, The test materials divided into high-yielding, mid-yielding, mid-low-yieldingand low-yielding type,accounting for8.06%,respectively,20.43%,53.76%and17.20%.Mid-low-yielding type rice varieties was most, average4148.10kg/hm2, yieldcomponents were363.8spike/m2,55.3grains/spike, seed rate of90%,1000grain weight26g.Spike weight and grain density in the group is1.2g/spike and2.9grains/cm was most..2. The sugar-spikelet ratio of different yield types did not reach a significant level. The CVof sugar-spikelet ratio of low-yielding type was minimum; the degree of variation wasrelatively minimal. The theoretical yield and sugar-spikelet ratio of high-yielding type rice wassignificantly positively correlated..Primary branches of mid-low-yielding type and secondarybranches was maximum, but the difference between the other types were not significantlevel..Primary branches and secondary branches of high-yielding types of were negativelycorrelated with yield traits.3. Processing quality milled rice rate of low-yielding, mid-low-yielding type wassignificantly higher than other types, the differences between the different types of milled ricerate was not significant. Appearance quality grain percentage and chalkiness degree ofdifferent yield type reached a significant level. Nutritional quality the protein content of highyield and mid yielding, mid-low-yielding reached significant or high significantly. Amylosecontent of each yield type was significantly higher than low-yielding types, fat content of eachtype did not reach significant difference. Rice composite score of high-yielding type and othertypes reached a significant level. 4. Eating rice varieties with high average scores albumin globulin content and Eating ricevarieties low score differences and have reached a significant level, the average gluten contentdid not reach significant difference in taste of rice varieties with high average scores glidingand eating a low score differences rice varieties reached a significant level. Eating high schoolscores low albumin globulin rice varieties are gluten score was positively correlated witheating, and eating protein gliding scores were negatively correlated or negatively correlated.5. Cultivars yield of high yielding type and processing quality, aspect ratio, nutritionalquality was positively correlated; yield of mid yielding type and chalky rate and chalkiness,total protein, amylose, eating scores were positively correlated; yield of mid-low-yielding typeand milled rice, appearance quality, fat, amylose, eating scores were positively correlated;yield of low-yielding type and appearance quality, fat content was positive correlation.