共查询到20条相似文献,搜索用时 62 毫秒
1.
绿源生物有机肥在水稻上的肥效试验 总被引:5,自引:0,他引:5
为了探讨绿源生物有机肥对水稻生产的影响,于2002年4月~2003年11月进行两年四造田间小区试验。结果显示:施用绿源生物有机肥的处理与常规施肥处理相比,能增加水稻的每穗实粒数,提高结实率和千粒重,平均增产12.1%,增产效果显著。 相似文献
2.
3.
不同养分含量专用肥均以高氮含量配方有利于水稻叶片叶绿素含量和群体光合速率的增加,增加了水稻地上部的营养生长量,为最终形成较高的子粒产量奠定了基础。高氮含量专用肥增加水稻产量的关键在于增加了穗数,每穗粒数和千粒重。 相似文献
4.
5.
根据我市土壤普查成果和推广配方施肥经验,我站相继开发的水稻普通型专用肥和水稻多元型专用肥,通过全县十多个乡镇连续3年试用,普遍表现具有控蘖促穗,增粒,增重,增产作用,其中多元型专用肥还能较好的减国病害,增强抗性,延长功能叶寿命等特点。 相似文献
6.
7.
为探索控释专用肥在黑龙江省对水稻生长及产量的影响,以松粳9号为试验材料,对控释肥在庆安县水稻生产上的应用效果进行了研究。结果表明:控释专用肥与等养分普通复合肥和常规高氮复合肥比较,可使水稻增产23.90%和15.11%。处理4在减少控释专用肥施用量30%的情况下,比常规施肥增产4.62%。 相似文献
9.
10.
11.
12.
13.
14.
15.
Ammonia emission is one of the most important pathways of nitrogen loss from agricultural cultivated field. In this paper, we report the measurement of ammonia emission from paddy rice field obtained by surface application of urea fertilizer with water management. The main objective of the present study were to assess the amount of NH3 emission and the loss of nitrogen from paddy field as affected by various N doses, i.e., 0 (control), 90 (N1), 180 (N2), 270 (N3) and 360 (N4) kg ha-1, following field surface application of urea fertilizer with water management. Ammonia emissions were measured by continuous airflow enclosure method from plots fertilized with the application of surface urea. Increase in urea-N dosage increased NH3 emission thatwas measured from paddy rice field. Ammonia emission started immediately and was almost complete within 12 days after top dressing of urea application to the soils. Ammonia emissions were nearly constant in all treatments from 12 days after fertilizer application. Highest ammonia emission rate was 28 g/day and total amount of ammonia emission was 56.21 kg ha-1 for 360 kg N ha-1 dose. No remarkable observation was found about temperature for ammonia emission. Due to proper water management practices less emission was observed throughout the experiment period. The results also show that N loss through NH3 emission accounted for 11 to 16% during the ricegrowing season. These magnitudes of loss of N appear to be most important for environmental point of view. 相似文献
16.
17.
18.
浅谈水稻测土配方施肥技术 总被引:1,自引:0,他引:1
测土配方施肥是现代农业科技综合运用的成果,根据作物需肥规律,土壤供肥性能,以及肥料效应,均衡、合理、及时施用作物生长发育需要的各种营养元素,并能降低生产成本,提高农产品产量、实现农民增产增收。 相似文献
19.