نتایج جستجو برای: n p k ca and mg uptake
تعداد نتایج: 17185961 فیلتر نتایج به سال:
به منظور تعیین محدودیتهای تغذیه ای عناصر غذایی و اثرات کودهای فسفر و روی در ایجاد تعادل بین این عناصر در گندم در شرایط دیم، آزمایشهایی در طی دو سال زراعی در ایستگاه موسسه تحقیقات کشاورزی دیم (مراغه) با سه سطح فسفر (0، 50 و 100 کیلوگرم پنتااکسید فسفر در هکتار) و چهار سطح روی (0، 10، 20 و 30 کیلوگرم zn در هکتار) به صورت فاکتوریل در قالب طرح بلوکهای کامل تصادفی با سه تکرار به اجرا درآمد. میزان ازت...
برای تعیین شاخصهای انحراف از درصد بهینه (dop) و روش تلفیقی تشخیص و توصیه (dris) ارزیابی وضعیت تغذیهای پیاز (allium cepa l.) و مقایسه دو روش مذکور، نمونههای برگ از 50 مزرعه جمعآوری و غلظتهای عناصر غذایی n، p،k ، ca،mg ،fe ،mn ، zn ،cu و b تعیین شدند. با توجه به مقدار عملکرد، مزارع به دو گروه، مزارع با عملکرد بالا و پایین تقسیم شدند. نرمهای dris برای نسبتهای مختلف عناصر غذایی تعیین شدند. ...
Fertilization programs in lilium are suggested to start after shoot emergence or when the flower buds become visible because nutrients stored bulb adequate meet plant demands at transplant time. Defining nutrient uptake is essential determine periods of high demand and amounts which they should be provided. The objective this study was model accumulated Oriental provide insight into design envi...
This study evaluated the allelopathic potential and autotoxic interference with growth and nutrient uptake of two asparagus varieties; UC157 (U) and Gijnlim (G) from USA and Europe, respectively. The two varieties were cultivated in a continuous replanting system in different rotational patterns with soil amended by asparagus root residues, and unamended soil (control) under greenhouse conditio...
This research was aimed to study the interest of flower analysis as a tool for the prognosis of nutritional deficiencies on cherry trees and confirm the influence of rootstock on the mineral uptake by tree. This type of diagnosis is compared with foliar analysis. The trial was established on a calcareous clay-loam soil, where ‘Sunburst’ cultivar on eight rootstocks: CAB 6P, CAB 11E, Masto de Mo...
A soilless cultivation experiment, in a medium containing sand, perlite and peat, based on Hoagland nutrient solution, was designed and carried out to investigate the growth and postharvest response of Zinnia to different concentrations of nitrogen (N) and calcium (Ca). Treatments included control 1 (without nutrient solution), control 2 (nutrient solution without N and Ca), and the mixtures of...
To investigate the effects of nutrient-solution concentrations of potassium (K) and calcium (Ca), as well as different ratios of K/Ca, on growth and flowering of lisianthus (Eustoma grandiflorum) under soilless culture conditions, a factorial experiment was conducted with two factors including two K levels (300 and 400 mg/L) and three Ca levels (80, 100 and 160 mg/L). Results showed that K= 400...
in order to study the effect of intercropping of corn with bean and bitter vetch and farmyard manure (fym) on corn nutrition, a factorial experiment was carried out on the basis of randomized complete blocks design with three replications. the factors were types of intercropping systems at levels of sole bean, bean+corn, sole bitter vetch, bitter vetch+corn, sole corn, and fym at levels of 0, 3...
The aim of this study was to compile DRIS (Diagnosis and Recommendation Integrated System) norms sufficiency ranges for pepper grown in greenhouses the determination variation during different phenological stages crop. were constituted by 367 leaf samples Capsicum annuum L. which collected crop (flowering (FL), fruiting (FT), fruit development (FD), harvesting (HV)). Two developed; one includin...
the effects of banana continuous cropping on soil quality and chemical properties and crop yield were investigated under continuous cropping for 1, 3, 5, 7, 10, and 15 years in hainan province, china. the results indicated that the contents of total n, total k, available k, nh4-n, exchangeable ca, and available cu tended to increase, while total organic c (toc), available s, and available zn te...
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