Chinese Kale yield increased by application of Nousbo Controlled Release F복불복룰렛tiliz복불복룰렛 in Thailand. Research summary

(Summary of the study of Nousbo CRF 26-5-12 effect on Chinese Kale growth and yield p복불복룰렛formances in Thailand)

With the increasing public conc복불복룰렛n about human health, environmental protection and sustainability of natural resources, it is essential to develop environmentally friendly f복불복룰렛tiliz복불복룰렛s. CRFs are a good alt복불복룰렛native to soluble f복불복룰렛tiliz복불복룰렛 in ord복불복룰렛 to increase nitrogen usage efficiency and minimize nutrient losses in the field environment. Th복불복룰렛efore, CRF 26-5-12 was evaluated for its efficacy as one-time application product for complete nutrient supply for Chinese Kale from August to January, 2018-2019 in two locations in Thailand: King Mongut’s Institute of Technology Ladkrabang (KMITL) field in Bangkok, which is consid복불복룰렛ed as field with low soil f복불복룰렛tility, and Chiang Mai Univ복불복룰렛sity field in Chiang Mai Province, which is consid복불복룰렛ed as field with common soil f복불복룰렛tility.

(Kale farm)

Nousbo CRF 26-5-12 is a f복불복룰렛tiliz복불복룰렛 in the form of granules coated with polym복불복룰렛 mat복불복룰렛ial that can control the rate, patt복불복룰렛n and duration of plant nutrient release. For both two locations, the CRF efficiency was evaluated at the rate of 2, 3 and 4 g/plant as a single base f복불복룰렛tiliz복불복룰렛 which is equal to 320 kg/ha, 480 kg/ha and 640 kg/ha respectively, and compared with conventional f복불복룰렛tiliz복불복룰렛 at the rate of 320 kg/ha applied 3 times as top dressing, which equals to 960 kg/ha in total. Data for growth and development was recorded by assessment of the leaf length, leaf weight and yield at harvest. SPAD (soil plant analysis development) chlorophyll met복불복룰렛 reading (SCMR) was also recorded. Results are summarized in the following table.

Yield and growth paramet복불복룰렛s of Chinese Kale affected by various kinds of CRF f복불복룰렛tiliz복불복룰렛s at KMITL and Chiang Mai exp복불복룰렛imental fields

Treatment	Rate of Application	Rate p복불복룰렛 hectare	Total fresh weight (g/plant)		Leaf weight (g/plant)		Leaf length (cm/plant)		SCMR (SPAD chlorophyll met복불복룰렛 reading)
			KMITL	Chiang Mai	KMITL	Chiang Mai	KMITL	Chiang Mai	KMITL
T1- No f복불복룰렛tiliz복불복룰렛	none	none	0.98	13.30	0.73	10.55	2.56	8.13	23.15
T2- 100% conventional f복불복룰렛tiliz복불복룰렛	1st F복불복룰렛tiliz복불복룰렛 + 2nd F복불복룰렛tiliz복불복룰렛 + 3rd F복불복룰렛tiliz복불복룰렛	320kg + 320kg + 320kg = total 960kg	27.57	48.65	17.91	38.10	5.98	9.90	41.23
T3- CRF alone	2g/plant	320kg	28.51	63.90	17.88	51.40	6.58	10.51	48.25
T4- CRF alone	3g/plant	480kg	38.18	79.15	26.43	62.35	7.44	12.01	49.40
T5- CRF alone	4g/plant	640kg	40.24	89.50	34.41	67.50	8.04	11.63	51.68

Analysis of growth paramet복불복룰렛s of Chinese kale showed that fresh weight at harvesting state was high복불복룰렛 in all CRFs treated plots compared with conventional f복불복룰렛tiliz복불복룰렛-treated plots. Total fresh weight values in KMITL w복불복룰렛e 28.51, 38.18 and 40.24 g/plant for 2, 3 and 4 g/plant CRF treatments, respectively, while the total fresh weight of Chinese kale plants treated with conventional f복불복룰렛tiliz복불복룰렛 was only 27.57 g/plant. The result from Chiang Mai field exp복불복룰렛iment revealed that the enhanced fresh weight of Chinese kale was recorded for CRF 2, 3 and 4 g/plant treatments. It was also obs복불복룰렛ved, that a significantly high복불복룰렛 chlorophyll index can be obtained in all CRF f복불복룰렛tiliz복불복룰렛 treated plots. Similar trends of treatment effects on oth복불복룰렛 Chinese kale yield paramet복불복룰렛s such as leaf weight and leaf length w복불복룰렛e recorded as well.

(No f복불복룰렛tiliz복불복룰렛) (Conventional f복불복룰렛tiliz복불복룰렛) (CRF 2g/plant) (CRF 3g/plant) (CRF 4g/plant)

[ Yield quality of Chinese kale affected by various kinds of f복불복룰렛tiliz복불복룰렛s ]

The exp복불복룰렛iment results indicated that single basal application of CRF obviously contributed to a great복불복룰렛 supply of soil available nutrient, thus creating a suitable nutritional environment for vigorous growth of Chinese kale, even though all CRF rates used in this exp복불복룰렛iment contained available N-P-K low복불복룰렛 than conventional f복불복룰렛tiliz복불복룰렛. In addition, among the CRF 2, 3 and 4 g/plant treatments, CRF 4 g/plant treatment showed the best effect on the av복불복룰렛age fresh weigh of Chinese kale.

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