摘要
为解决部分谷子杂交种"库"、"源"失调,生育后期易脱肥,产量潜力得不到充分发挥的问题,以张杂谷8号为试验材料,采用裂区试验设计,其中,主处理为施肥量,设6个水平(拔节期沟施KCl150 kg/hm2+尿素75 kg/hm2,抽穗前沟施尿素150 kg/hm2;拔节期沟施KCl 150 kg/hm2+尿素75 kg/hm2,抽穗前沟施尿素225 kg/hm2;拔节期沟施KCl 150 kg/hm2+尿素75 kg/hm2,抽穗前沟施尿素300 kg/hm2;拔节期沟施KCl 225 kg/hm2+尿素150 kg/hm2,抽穗前沟施尿素150 kg/hm2;拔节期沟施KCl 225 kg/hm2+尿素150 kg/hm2,抽穗前沟施尿素225 kg/hm2;拔节期沟施KCl 225 kg/hm2+尿素150 kg/hm2,抽穗前沟施尿素300 kg/hm2);副处理为留苗密度,设5个水平(22.50万株/hm2、26.25万株/hm2、30.00万株/hm2、33.75万株/hm2、37.50万株/hm2)。研究不同施肥量与留苗密度对张杂谷8号主要农艺性状和产量的影响,旨为建立谷子杂交种夏播高产栽培技术体系奠定基础。结果表明:施肥量对穗长和穗直径有显著影响,对产量有极显著影响,对株高和单位面积穗数影响不大;留苗密度对穗长、穗直径、单位面积穗数和产量有极显著影响,对株高影响不大。在相同密度条件下,随着施肥量的增加,谷子穗长、穗直径和产量增加;在相同施肥量条件下,随着留苗密度的增加,穗长和穗直径减小,单位面积穗数和产量增加,其中密度在30.00万～37.50万株/hm2范围内对产量影响不显著。综合施肥和密度互作试验产量结果,认为在冀中南夏播最利于发挥张杂谷8号产量潜力的栽培方式为:在30.00万～37.50万株/hm2留苗密度下,拔节期施KCl225 kg/hm2+尿素150 kg/hm2、抽穗前施尿素225 kg/hm2。
In order to solve the in late growth stage and not full problems such as the imbalanced sink-source of millet hybrids, fertility insufficent production potential, the effeccts of fertilization and density on the main agronomic traits and yield of millet hybrid Zhangzagu No. 8 were studied by the split plot experiment design to lay a foundation for the summer seeding high yield cultivation techniques. The main treatment was fertilizer rate which had six levels including furrow application of KC1 150 kg/hm2 ＋ urea 75 kg/hm2 at jointing stage and urea .150 kg/hm2 before heading, furrow application of KC1 150 kg/hm2 ＋ urea 75 kg/hm2 at jointing stage and urea 225 kg/hm2 before heading, furrow application of KC1 150 kg/hm2 ＋ urea 75 kg/hm2 at jointing stage and urea 300 kg/hm2 before heading , furrow application of KC12 2 5 kg / hm2 ＋ urea 1 5 0 k2 / hm2 at iointing stage and urea 1 5 0 k2 / hm2 before heading, furrow application of KC1 225 kg/hm2 ＋urea 150 kg/hm2 at jointing stage and urea 225 kg/hm2 before heading, and furrow application of KC1 225 kg/hm2 ＋ urea 150 kg/hm2 at jointing stage and urea 300 kg/hm2 before heading. The density had five levels including 225 000 plants/hm2,262 500 plants/hm2, 300 000 plants/hm2, 337 500 plants/hm2 and 375 000 plants/hm2. The results showed that the fertilizer rate had significant influcences on the ear length and ear diameter, had very significant influence on the yield, while had little influcence on the plant height and ear number per unit. The density had very significant influence on the ear length, ear diameter, ear number per unit and yield, while had little influence on the plant height. At the same density, the ear length, ear diameter and yiled increased with the increasing of fertilizer rate. At the same fertilizer rate, the ear length and ear diameter decreased, while the ear number per unit and yield increased with the increasing of density. The density of 300 000 - 375 000 plants/hm2 had no significant infulence on the yield. When the density was 300 000 -375 000 plants/hm2, 225 kg/hm2 KC1 and 150 kg/hm2 urea were applied at jointing stage, and 225 kg/hm2 urea was applied before heading, the yield potential was the largest in the central south Hebei.
出处
《河北农业科学》
2012年第1期1-5,共5页
Journal of Hebei Agricultural Sciences
基金
河北省重大技术创新项目子课题(09220120Z-2-1)
