摘要
试验在大田条件下进行，以国家水稻工程醴陵基地应用的旺壮重栽培法作超高产栽培途径，与当地习惯栽培法比较研究了超高产双季稻根系生长及生理特性，结果表明：根系生长量以生长中期最大，其次为前期，生长后期新根发生和老根衰亡同时进行，因此根量增加很少甚至呈负增长。超高产栽培条件下早稻 Ｖ４０２ 和晚稻 Ｖ１９８ 全生育根系生长总量为 １８４４３ 和１７１０４ｋｇ·ｈｍ － ２，比对照分别提高 ２０６４％ 和 ２５０５％ ，并且这种根量优势主要在水稻生长的前、中期形成；根系总吸收表面积和活跃表面积也表现出相同的趋势，同时，早稻中期、晚稻中后期根系 α－ 萘胺氧化力比对照增加；根系对３２ Ｐ吸收活力以前期和中期较高，抽穗后明显降低；超高产水稻各生育期单蔸根系吸收的３２ Ｐ 总量明显高于对照，其增加的幅度为 ３８６％ ～３７７７％ ，并且前、中期提高的幅度大于后期，超高产栽培条件下这种根系生长和根系活力的优势最终转化为产量优势，１９９７ 和 １９９８ 年实际产量分别为 １７６５２ 和 １７７７２ｋｇ·ｈｍ － ２，比习惯栽培法提高 ２１２８％ 和 １５５７％ 。
Root growth and its physiological properties were compared between supper high yield cultivation(treatment) and traditional cultural method. The growth of root system reached its fastest phase at mid-development stage, faster than that at the early stage. Growth actually stopped and negative growth was observed at late stage because of senescence. Maximum root weight of treated early rice V402 and late rice V198 was 1844 3 and 1710 4kg hm -2 , increased by 20 64% and 25 05% than that of control respectively. Some genotype differences were found in the 32 P absorption. Large-panicle type absorbed more while mid-panicle type absorbed less. Treatment also enhanced more absorption, increased the α-nathphyl amine (indexed root activity), root total and active absorbing area. Under the high yield the supper cultivation condition, the actual yield reached 17652 and 17772kg.hm -2 , increased by 21 28% and 15 57% than that of control.
出处
《激光生物学报》
CAS
CSCD
1999年第3期194-200,共7页
Acta Laser Biology Sinica
基金
国家科委"九.五"重大科技攻关项目
关键词
双季稻
超高产栽培
根系特性
Paddy rice
Supper cultivation condition
Root propeties
