优质籼稻不同生态区分期播种研究

ECOLOGICAL EFFECT OF GOOD CULTIVARS WITH DIFFFERENT SEEDING TIME IN INDICA RICE

用３个不同熟期的优质籼稻银桂粘、金麻粘和金竹粘，以中早熟高产品种广二矮１０４为对照，在省内４个不同生态地区进行分期播种试验。结果表明，早熟品种银桂粘在海拔１１００ｍ以上温凉地区，中迟熟品种金麻粘和金竹粘在９００ｍ以下热量较好地区适期播种条件下，都能获得较高的产量。品种的精米率受试点和播种期的影响较小，整精米率、垩白粒率和直链淀粉含量受试点和播种期影响较大；不同的生态条件对不同品种影响不同；产量与稻米蛋白质含量成负相关。

The quality varieties with different mature period of Indica rice,Yingguizhan,Jingmazhan and Jingzhuzhan,and check variety Guang-er-ai 104 were examined under several sowing time in four ecological locations of Guizhou province.The results indicated that planting the early variety Yingguizhan in cool area at the altitude above 1100m,and the medium-late varieties Jingmazhan and Jingzhuzhan in warm area below 900m,a certain high yield can be obtained.The milling recovery was slight affected by the altitude and seeding time,but the intact milling recovery,chalk rate and amylose contents affected greatly.The yield was negatively correlated with the protein content of the rice.