摘要
１９８６～１９９１年，在田间及盆栽条件下，研究了秧田茬免耕和常规耕下种植水稻的生长发育特性和植株干物质的积累转换特点等有关产量效应的生理基础，免耕比常规耕增产稻谷６５４ｋｇ／ｈａ（增加９．８７％）。其生理基础主要在于：免耕水稻各生育期具有较大的根系生长量（单株根干重，根数，总根长等），较强根系活力（较强的发根力，较大的表面积，较高的ａ－ＮＡ氧化力，较大的分布范围和对３２Ｐ较强吸收能力等）；植株地上部分矿质养分３２Ｐ的积累与分配，干物质的积累转换等方面，免耕都比正常规耕具有优势。在植株地上部性状上免耕表现出前期力蘖早生长快发，后期成穗率较高。
During 1986-1991, based on field trial and pot experiment, the characteristics of growth, development, accumulation and tromsformation of plant dry matter and other physiological indexes related to yield of paddy rice on nontillage and conventional tillage condition following rice seedling bed stubble were stuied. The yield of nontillage is 654kg/ha,higher than that of conventional tillage(increased by 9. 87%), Its physiiilogical basses are mainly as follows; at all growth stages, dry matter, number, total length per plant of root system under non-tillage were higher than that of conventional tillage, the activities of root system under nontillage condition were stronger(stronger recuperative ability, bigger surface area, higher a-NA oxidative ability, wider and deeper distribution and stronger absorbing ability to 32p); Also rice plant under nontillage condition has above ground parts superiority, including accumlation and distribution of 32p, accumlation and transformation of plant dry matter etc. As 32p, accumlation and transformation of plant dyr matter etc. As the peoperties of plant above ground parts, the tillering speed at earlier stage and the effective panicle number per unit area of nontillage were faster and higher than convertional tillage.
出处
《四川农业大学学报》
CSCD
1994年第3期396-401,共6页
Journal of Sichuan Agricultural University
基金
"川西平原少免耕稻作高产技术与应用"课题
关键词
免耕
水稻
根
产量效应
NOTILLAGE
CONVENTIONAL TILLAGE
LOWLAND RICE
ROOT.
