中粳稻分蘖穗率对产量构成和稻米品质影响的研究

Effects of Tiller Ear Rate on Grain Yield and Rice Quality for Mid-ripe Keng Rice

进行中粳稻分蘖穗率对产量构成和稻米品质影响试验，结果表明：中粳多穗型品种西光和大穗型品种农林２８６分蘖穗率分别为２５．７％～９３．２％和８．２％～９０．３％，其分蘖穗率（Ｘ）与稻谷产量（Ｙ）间呈显著正相关；分蘖穗率达７０％以上显著增产，其结实率和千粒重无显著差异，亩有效穗数虽略有减少，但每穗粒数显著增加，分蘖穗率（ｘ）与亩颖花量（ｙ）呈极显著正相关。在本试验条件下，分蘖穗率高低对稻谷糙米率、精米率、整精米率等加工品质和垩白粒率、长宽比等外观品质无显著影响。

Two cultivars,i.e.Xiguang (multiple ear type) and Nonglin 286 (large ear type) were planted with a density of 3 000 000 plants/ha,and 7 basic main stems/plant of 1,3,5,7,9,11,13 from 1993 to 1994 on experimental farm of Anhui Agricultural University.The tiller ear rate of Xiguan and Nonglin 286 were 25 71%～93 21% and 8 21%～90 32%,respectively,and positively corelated to grain yield (r 1=0 6062 * for Xiguang and r 2=0 7806 ** for Nonglin 286). High tiller ear rate (over 70%) resulted in significant increase of grain yield and kernel number/ear and slight decrease of ear number per hactare,while ripen grain yield and kernel weight stayed unchanged.Positive corelationship between tiller ear rate and total number of spikes per hactare was also observed (r 1=0 8900 ** for Xiguang,r 2=0 8670 for Nonglin 286).It was found that tiller ear rate exerted no significant effects on milling quality and appearance quality of rice in the given conditions.