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通过广二矮104的播期和移栽秧龄(叶龄)试验,初步明确了以贵阳为代表的黔中地区中熟中籼的最佳播期和移栽秧龄等是:1、丰年4月16日至5月16日播种均可安全成熟,但以4月中、下旬播种为佳。2、灾年4月中旬至5月中旬播种可躲过倒春寒和秋风危害;而4月中旬至5月下旬播种均不能完全躲过夏旱危害,但早播比晚播受害的可能性及程度小。3、从丰、灾年综合考虑,以4月中旬播种最佳。4、移栽秧龄随播期而定:4月上旬播,7～8叶栽;4月中、下旬播,6～7.5叶栽;5月上旬播,5～7叶栽;5月中旬播,5～6叶栽;5月下旬播,5叶以下栽(或直播)为佳。5、净播量随移栽秧龄而定:5～6叶栽,80斤/亩;6～8叶栽,60斤/亩;9叶以上栽,40斤/亩;直播20斤/亩。6、本田基本苗数随秧苗素质而定,嫩壮分蘖秧,8～10万/亩;一般秧苗10～14万/亩;老健无蘖秧,14～20万/亩。7、海拔700～900米:且光温条件优于贵阳者,播期宜偏早(4月上旬),秧龄宜偏小(5～7叶);海拔1200米以上且光温条件不如贵阳者,播期宜偏迟(4月下旬),秧龄宜偏大(7～8叶)。
The results showed that the best sowing date and transplanting seedling age of mid-maturing medium-season indica rice in central Guizhou represented by Guiyang were: 1, April of the harvest year May 16 to May 16 can be safely and mature sowing, but in April, late sowing is better. 2, the disaster from mid-April to mid-May sowing can escape the late spring cold and autumn hazards; and mid-April to late May sowing can not completely avoid the summer drought hazards, but the possibility and extent of early sowing than late sowing victims small. 3, from abundance, disaster year comprehensive consideration, to sow the best mid-April. 4, transplanting seedling age with sowing may be: early April sowing, 7 ~ 8 leaf planted; April, late sowing, 6 ~ 7.5 leaf planted; early May broadcast, 5 ~ 7 leaf planted; mid-May broadcast , 5 ~ 6 leaf planted; late May broadcast, planted below 5 leaves (or broadcast) is better. 5, net sowing with transplanting seedling age may be: 5 ~ 6 leaf planted, 80 kg / acre; 6 ~ 8 leaf planted, 60 pounds / acre; 9 leaves planted above 40 pounds / acre; 6, Honda basic seedlings with the quality of seedlings may be, nurturing tillering seedlings, 8 to 100000 / mu; general seedlings 10 ~ 140000 / mu; old no tillering seedlings, 14 ~ 200000 / mu. 7, elevation of 700 to 900 meters: and light and temperature conditions are superior to those in Guiyang, sowing date should be early (early April), seedling age should be small (5 to 7 leaves); elevation above 1200 meters and light and temperature conditions than Guiyang , Sowing date should be late (late April), seedling age should be larger (7 to 8 leaves).