Effects of Water-retention Treatment on the Physiological Characteristics and Latex Yield of Hevea brasiliensis

doi:10.3969/j.issn.1000-2561.2019.11.001

Abstract

Abstract:

Rubber tree variety ‘Yunyan 77-4’ was selected as the test material. With conventional management (without covering) as the control, covering film, covering grass and adding water-retaining agent were adopted as the three water-retaining treatments. Through field comparative experiments, the effects of different treatments on the physiological characteristics of leaves and latex yield at different growth stages of rubber tree in the whole year were studied. The results of variance analysis showed that covering film, covering grass and adding water retaining agent significantly increased soil water content in dry season, and significantly affected the contents of soluble protein (SP), proline (Pro), soluble sugar (SS) and sucrose (Suc) in the leaves of rubber trees. The yield of latex increased by the three water retaining treatments. Principal component analysis showed that the cumulative contribution rate of the first three principal components was 84.8%, indicating that the first three principal components could reflect most of the information of original variables. According to the comprehensive score, the order of the advantages and disadvantages of each treatment was as follows: adding water-retaining agent, covering grass, covering film and the control. The order of comprehensive performance of physiological indexes of rubber leaves at different growth stages in the whole year was as follows: December, March, January-February, November, June, July, September-October, August, May and April. Therefore, it can be inferred from the results that all water conservation treatments can effectively alleviate the adverse effects of seasonal drought on the growth of rubber trees. In terms of production, a reasonable tapping period can be selected according to the comprehensive performance of physiological indexes of leaves at different growth stages throughout the year.

Key words: Hevea brasiliensis, water-retention treatment, soil moisture content, physiological characters, comprehensive evaluation, yield

YUAN Huifang,HUANG Jing,YUE Hai,TIAN Yaohua. Effects of Water-retention Treatment on the Physiological Characteristics and Latex Yield of Hevea brasiliensis[J]. Chinese Journal of Tropical Crops, 2019, 40(11): 2097-2104.

Figures/Tables 8

References 37

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月份Month	可溶性蛋白含量Soluble protein content/(mg·g^-1)
月份Month	对照Contrast	盖膜Cover film	盖草Grass cover	保水剂Water-retaining agent
1-2月	8.33±0.63^cC	15.67±0.14^aA	11.81±0.38^cdB	8.59±0.38^dC
3月	4.84±0.27^dB	16.20±0.46^aA	5.29±0.10^eB	4.63±0.22^fB
4月	5.88±0.13^dB	7.45±0.22^eA	5.78±0.22^eB	5.52±0.09^efB
5月	17.76±0.22^aA	12.93±2.47^bcBC	10.40±1.50^dC	11.21±1.33^cC
6月	16.58±0.12^aA	15.74±0.43^aA	15.91±0.62^aA	15.95±0.16^aA
7月	13.65±0.67^bA	10.55±0.23^cdB	13.71±0.43^bA	11.66±0.55^cB
8月	8.04±1.13^cA	8.80±0.44^deA	5.19±0.32^eB	8.41±1.09^dA
9-10月	7.44±0.20^cA	6.79±0.09^eB	7.03±0.10^eAB	7.27±0.15d^eA
11月	7.60±0.16^cA	6.25±0.35^eB	6.58±0.38^eB	6.07±0.37^efB
12月	14.10±0.13^bA	13.83±0.44^abA	13.19±0.44^bcA	13.81±0.46^bA

月份Month	可溶性蛋白含量Soluble protein content/(mg·g^-1)
月份Month	对照Contrast	盖膜Cover film	盖草Grass cover	保水剂Water-retaining agent
1-2月	8.33±0.63^cC	15.67±0.14^aA	11.81±0.38^cdB	8.59±0.38^dC
3月	4.84±0.27^dB	16.20±0.46^aA	5.29±0.10^eB	4.63±0.22^fB
4月	5.88±0.13^dB	7.45±0.22^eA	5.78±0.22^eB	5.52±0.09^efB
5月	17.76±0.22^aA	12.93±2.47^bcBC	10.40±1.50^dC	11.21±1.33^cC
6月	16.58±0.12^aA	15.74±0.43^aA	15.91±0.62^aA	15.95±0.16^aA
7月	13.65±0.67^bA	10.55±0.23^cdB	13.71±0.43^bA	11.66±0.55^cB
8月	8.04±1.13^cA	8.80±0.44^deA	5.19±0.32^eB	8.41±1.09^dA
9-10月	7.44±0.20^cA	6.79±0.09^eB	7.03±0.10^eAB	7.27±0.15d^eA
11月	7.60±0.16^cA	6.25±0.35^eB	6.58±0.38^eB	6.07±0.37^efB
12月	14.10±0.13^bA	13.83±0.44^abA	13.19±0.44^bcA	13.81±0.46^bA

月份Month	脯氨酸含量Proline content/(μg·g^-1)
月份Month	对照Contrast	盖膜Cover film	盖草Grass cover	保水剂Water-retaining agent
1-2月	136.77±20.02^cAB	67.98±3.26^dC	102.16±7.58^cdBC	159.41±11.63^cA
3月	71.13±1.07^eB	79.38±2.30^dA	72.05±1.58^dAB	76.11±3.77^efAB
4月	86.58±5.89^deA	73.03±2.59^dA	88.80±6.24^cdA	88.80±6.77^efA
5月	162.53±7.42^bB	246.70±16.15^bAB	217.02±9.68^bAB	270.41±7.86^bA
6月	143.6±3.95^bcA	142.32±17.80^cA	112.39±4.57^cB	145.09±6.86^cdAB
7月	78.08±8.83^deA	56.47±2.19^dC	74.76±3.23^dAB	62.63±1.53^fBC
8月	91.94±4.34^deB	120.82±5.46^cA	78.95±1.42^cdC	96.81±4.66^efB
9-10月	131.29±6.32^cA	111.96±7.53^cB	102.1±2.73^cdB	112.08±2.31^deB
11月	99.87±3.47^dAB	119.28±2.28^cA	98.28±5.02^cdB	113.37±11.32^deAB
12月	436.74±1.76^aA	294.48±10.10^aC	366.05±10.36^aB	369.43±9.34^aB

月份Month	脯氨酸含量Proline content/(μg·g^-1)
月份Month	对照Contrast	盖膜Cover film	盖草Grass cover	保水剂Water-retaining agent
1-2月	136.77±20.02^cAB	67.98±3.26^dC	102.16±7.58^cdBC	159.41±11.63^cA
3月	71.13±1.07^eB	79.38±2.30^dA	72.05±1.58^dAB	76.11±3.77^efAB
4月	86.58±5.89^deA	73.03±2.59^dA	88.80±6.24^cdA	88.80±6.77^efA
5月	162.53±7.42^bB	246.70±16.15^bAB	217.02±9.68^bAB	270.41±7.86^bA
6月	143.6±3.95^bcA	142.32±17.80^cA	112.39±4.57^cB	145.09±6.86^cdAB
7月	78.08±8.83^deA	56.47±2.19^dC	74.76±3.23^dAB	62.63±1.53^fBC
8月	91.94±4.34^deB	120.82±5.46^cA	78.95±1.42^cdC	96.81±4.66^efB
9-10月	131.29±6.32^cA	111.96±7.53^cB	102.1±2.73^cdB	112.08±2.31^deB
11月	99.87±3.47^dAB	119.28±2.28^cA	98.28±5.02^cdB	113.37±11.32^deAB
12月	436.74±1.76^aA	294.48±10.10^aC	366.05±10.36^aB	369.43±9.34^aB

组分成分 Component content	月份 Month	对照 Contrast	盖膜 Cover film	盖草 Grass cover	保水剂 Water-retaining agent
可溶性糖 SS/(mg·g^-1)	1-2月	19.83±0.14^aB	21.26±0.08^aA	19.95±0.21^aB	20.89±0.27^aA
	3月	15.30±0.23^cC	17.17±0.57^bcAB	18.08±0.34^bA	16.47±0.29^bB
	4月	12.08±0.55^dA	11.02±0.93^eA	11.46±1.12^eA	10.90±0.24^eA
	5月	13.02±0.17^dA	13.47±0.32^dA	12.73±0.38^eA	12.35±0.72^dA
	6月	15.38±0.39^cB	15.77±0.91^cB	17.70±0.34^bcA	13.45±0.34^dC
	7月	16.94±0.38^bA	15.86±0.63^cAB	14.17±0.41^dC	15.16±0.27^cBC
	8月	18.86±0.51^aA	17.32±0.53^bcB	16.60±0.55^bcB	17.74±0.36^bAB
	9-10月	16.99±0.21^bA	18.00±1.01^bA	18.07±0.22^bA	17.12±0.40^bA
	11月	16.54±0.54^bA	16.21±0.40^bcA	16.28±0.35^cA	16.99±0.25^bA
	12月	19.83±0.46^aA	16.90±0.57^bcB	17.50±0.21^bcB	16.74±0.63^bB
蔗糖 Suc /(mg·g^-1)	1-2月	19.30±0.67^eC	65.56±2.49^bA	51.53±1.06^fB	52.98±1.70^eB
	3月	41.71±1.90^dB	54.44±0.96^cA	41.37±1.13^gB	42.60±0.63^fB
	4月	40.74±5.99^dA	49.35±2.61^cA	37.40±0.70^gA	38.09±2.35^fA
	5月	36.41±0.88^dA	37.44±0.88^dA	36.58±0.94^gA	35.47±2.11^fA
	6月	64.25±1.64^cA	54.39±4.21^cB	64.71±1.55^dA	52.14±2.59^eB
	7月	67.19±1.61^cA	51.46±0.74^cB	47.44±3.14^fB	65.55±1.79^cdA
	8月	60.12±2.87^cA	48.01±1.22^cB	59.59±1.19^eA	58.40±2.65^deA
	9-10月	82.59±1.40^bA	68.03±2.93^bB	77.32±2.27^bA	77.55±3.34^bA
	11月	98.27±4.40^aA	102.06±1.43^aA	98.39±2.25^aA	97.88±2.99^aA
	12月	63.68±1.27^cB	68.33±1.93^bA	70.18±0.52^cA	71.05±1.46^bcA