机械直播水稻田间简易诊断及调控技术研究

通过田间试验和大面积生产调查 ,经统计分析认为 :机械直播水稻关键生育期单位面积总苗数 (基本苗数或总茎蘖数 )、干物重、LAI(叶面积指数 )与产量及产量构成因素中单位面积穗数、每穗实粒数关系最为密切 ,可作为高产栽培中田间简易诊断的指标。 6叶和 9叶期是诊断产量及穗数、实粒数的适宜时期 ,并提出直播中粳水稻单产 82 5 0kg/hm2 以上的诊断指标及其调控技术

Machine Direct-seeding of Rice Simple Diagnosis and Regulation Practice in the Field

It is statistically claimed that, according to the results of field examinations and research of broad field planting, some items of machine direct-seeding of rice can be points in the field simple diagnosis of higher yield cultivation, such as the capacity of per unit area in key growth time( basic plants and their tillers),dry matter weight, LAI( leaf area index) and yield and its components as spike capacity per unit area ,real kernel capacity per spike, are the key points. The sixth leaf growth time is a suitable time to prospect yield, spike capacity and real kernel capacity as well as the ninth leaf growth time. Otherwise,the diagnosis points and their regulation practice are concluded.