Stimulation Technology and Adaptability of d6 Tapping System for Mid-aged Hevea Clone PR107 and Reyan 7-33-97

doi:10.3969/j.issn.1000-2561.2020.03.008

Abstract

Abstract:

Taking middle-aged PR107 and Reyan 7-33-97 as the research objects, treatment with five stimulation time (1, 2, 3, 4, 5 d before tapping) was set up, and the effects on the latex yield under the d6 tapping system were compared. The d4 tapping system was used as the control, and six treatment of the d6 tapping system with different stimulation intensity (including four concentrations of ethephon and three simulation frequencies under the highest concentration) was set up on the middle-aged PR107 and Reyan 7-33-97. The yield, latex physiology and the occurrence of TPD were analyzed. The optimal latex yield was obtained when ethephon was applied on the 2nd day after the last tapping or the 2nd to 3rd day of the first tapping in one stimulation cycle. The rubber-producing potential of the d6 tapping for middle-aged PR107 was difficult to be exploited through moderate stimulation. The stimulation strategy of 4% ethephon combined with 2 or 3 tapping intervals of stimulation frequency was able to obtain relatively good yield and physiological effects. While the d6 tapping system was practical in Reyan 7-33-97, the low stimulation intensity of 2.0%-2.5% ethephon combined with 2 or 3 tapping intervals of stimulation frequency could achieve a high yield, and maintain a good physiological response of laticifer. Annual variation of dry rubber yield (kilogram per tree per tapping, kg/t/t) showed that the d6 tapping system had an obvious high-yielding period (after Oct.) and the mean dry rubber yield (kg/t/t) in high-yielding months accounted for 3.0% to 4.8% of the annual production. Therefore, to ensure the tapping number in high yield period is key for a stable yield of the d6 tapping system.

Key words: Hevea brasiliensis, clone PR107, Reyan 7-33-97, d6 tapping system, stimulation technology

CLC Number:

S794.1

QIU Jian,XIAO Xianzhou,GAO Honghua,YANG Wenfeng,WEI Fang,WU Ming,LUO Shiqiao. Stimulation Technology and Adaptability of d6 Tapping System for Mid-aged Hevea Clone PR107 and Reyan 7-33-97[J]. Chinese Journal of Tropical Crops, 2020, 41(3): 474-481.

Figures/Tables 6

References 19

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橡胶树PR107 Hevea clone PR107			橡胶树热研7-33-97 Hevea clone Reyan7-33-97
编号 No.	割胶符号 Notations of tapping system	处理 Treatments	编号No.	割胶符号 Notations of tapping system	处理 Treatments
CK1	S/2 d4 2.5% ET 12 d	4天1刀,每3刀涂施2.5%乙烯利	CK2	S/2 d4 1.5% ET 12 d	4天1刀,每3刀涂施1.5%乙烯利
P1	S/2 d6 2.5% ET 12 d	6天1刀,每2刀涂施2.5%乙烯利	R1	S/2 d6 1.5% ET 12 d	6天1刀,每2刀涂施1.5%乙烯利
P2	S/2 d6 3% ET 12 d	6天1刀,每2刀涂施3%乙烯利	R2	S/2 d6 2% ET 12 d	6天1刀,每2刀涂施2%乙烯利
P3	S/2 d6 3.5% ET 12 d	6天1刀,每2刀涂施3.5%乙烯利	R3	S/2 d6 2.5% ET 12 d	6天1刀,每2刀涂施2.5%乙烯利
P4	S/2 d6 4% ET 6 d	6天1刀,每1刀涂施4%乙烯利	R4	S/2 d6 3% ET 6 d	6天1刀,每1刀涂施3%乙烯利
P5	S/2 d6 4% ET 12 d	6天1刀,每2刀涂施4%乙烯利	R5	S/2 d6 3% ET 12 d	6天1刀,每2刀涂施3%乙烯利
P6	S/2 d6 4% ET 18 d	6天1刀,每3刀涂施4%乙烯利	R6	S/2 d6 3% ET 18 d	6天1刀,每3刀涂施3%乙烯利

橡胶树PR107 Hevea clone PR107			橡胶树热研7-33-97 Hevea clone Reyan7-33-97
编号 No.	割胶符号 Notations of tapping system	处理 Treatments	编号No.	割胶符号 Notations of tapping system	处理 Treatments
CK1	S/2 d4 2.5% ET 12 d	4天1刀,每3刀涂施2.5%乙烯利	CK2	S/2 d4 1.5% ET 12 d	4天1刀,每3刀涂施1.5%乙烯利
P1	S/2 d6 2.5% ET 12 d	6天1刀,每2刀涂施2.5%乙烯利	R1	S/2 d6 1.5% ET 12 d	6天1刀,每2刀涂施1.5%乙烯利
P2	S/2 d6 3% ET 12 d	6天1刀,每2刀涂施3%乙烯利	R2	S/2 d6 2% ET 12 d	6天1刀,每2刀涂施2%乙烯利
P3	S/2 d6 3.5% ET 12 d	6天1刀,每2刀涂施3.5%乙烯利	R3	S/2 d6 2.5% ET 12 d	6天1刀,每2刀涂施2.5%乙烯利
P4	S/2 d6 4% ET 6 d	6天1刀,每1刀涂施4%乙烯利	R4	S/2 d6 3% ET 6 d	6天1刀,每1刀涂施3%乙烯利
P5	S/2 d6 4% ET 12 d	6天1刀,每2刀涂施4%乙烯利	R5	S/2 d6 3% ET 12 d	6天1刀,每2刀涂施3%乙烯利
P6	S/2 d6 4% ET 18 d	6天1刀,每3刀涂施4%乙烯利	R6	S/2 d6 3% ET 18 d	6天1刀,每3刀涂施3%乙烯利

品种 Variety	处理Treatment	试后刀数 Tapping number after treatment	涂药次数 Number of ethrel application	试前单株产量 Yield per tree before treatment/ kg	试后单株产量 Yield per tree after treatment/ kg	全年单株产量 Annual yield per tree/kg	刀次产 Annual yield per tree per tapping/kg	累计DRC Cumulation DRC/%	净增产率 Increase rate/%
橡胶树PR107	CK1	45	13	0.141^a	2.807^a	2.948	0.062^b	29.2^c
	P1	30	13	0.137^a	1.853^c	1.990	0.062^b	38.6^a	-32.1
	P2	30	13	0.140^a	2.026^bc	2.166	0.068^b	37.1^a	-27.3
	P3	30	13	0.140^a	2.202^ab	2.343	0.073^a	36.5^ab	-21.0
	P4	30	26	0.141^a	2.085^bc	2.226	0.069^ab	35.8^b	-25.7
	P5	30	13	0.143^a	2.515^ab	2.649	0.084^a	36.5^ab	-11.7
	P6	30	7	0.145^a	2.359^ab	2.485	0.079^a	36.9^ab	-18.3
橡胶树热研7-33-97	CK2	45	13	0.147^a	2.672^b	2.819	0.059^b	29.6^b
	R1	30	13	0.144^a	2.638^b	2.782	0.088^a	36.0^a	0.8
	R2	30	13	0.147^a	2.832^ab	2.979	0.094^a	36.7^a	6.0
	R3	30	13	0.142^a	2.851^ab	2.992	0.095^a	36.7^a	10.8
	R4	30	26	0.146^a	2.901^a	3.050	0.097^a	35.5^a	9.6
	R5	30	13	0.144^a	2.684^b	2.828	0.089^a	35.1^a	2.7
	R6	30	7	0.141^a	2.633^b	2.774	0.088^a	36.6^a	2.9

品种 Variety	处理Treatment	试后刀数 Tapping number after treatment	涂药次数 Number of ethrel application	试前单株产量 Yield per tree before treatment/ kg	试后单株产量 Yield per tree after treatment/ kg	全年单株产量 Annual yield per tree/kg	刀次产 Annual yield per tree per tapping/kg	累计DRC Cumulation DRC/%	净增产率 Increase rate/%
橡胶树PR107	CK1	45	13	0.141^a	2.807^a	2.948	0.062^b	29.2^c
	P1	30	13	0.137^a	1.853^c	1.990	0.062^b	38.6^a	-32.1
	P2	30	13	0.140^a	2.026^bc	2.166	0.068^b	37.1^a	-27.3
	P3	30	13	0.140^a	2.202^ab	2.343	0.073^a	36.5^ab	-21.0
	P4	30	26	0.141^a	2.085^bc	2.226	0.069^ab	35.8^b	-25.7
	P5	30	13	0.143^a	2.515^ab	2.649	0.084^a	36.5^ab	-11.7
	P6	30	7	0.145^a	2.359^ab	2.485	0.079^a	36.9^ab	-18.3
橡胶树热研7-33-97	CK2	45	13	0.147^a	2.672^b	2.819	0.059^b	29.6^b
	R1	30	13	0.144^a	2.638^b	2.782	0.088^a	36.0^a	0.8
	R2	30	13	0.147^a	2.832^ab	2.979	0.094^a	36.7^a	6.0
	R3	30	13	0.142^a	2.851^ab	2.992	0.095^a	36.7^a	10.8
	R4	30	26	0.146^a	2.901^a	3.050	0.097^a	35.5^a	9.6
	R5	30	13	0.144^a	2.684^b	2.828	0.089^a	35.1^a	2.7
	R6	30	7	0.141^a	2.633^b	2.774	0.088^a	36.6^a	2.9

品种 Variety	处理 Treatment	硫醇含量 Thiols content/ (mmol·L^-1)	蔗糖含量 Sucrose content/ (mmol·L^-1)	无机磷含量 Inorganic phosphorus content/ (mmol·L^-1)	镁离子含量 Mg²⁺content/ (mmol·L^-1)
橡胶树PR107	CK1	1.047±0.029^bc	6.043±1.943^b	15.283±0.691^ab	28.511±3.922^a
	P1	1.183±0.064^a	5.027±0.731^bc	11.897±0.649^c	29.133±3.365^a
	P2	1.133±0.006^ab	5.180±0.942^bc	12.403±0.298^c	27.489±2.036^ab
	P3	1.157±0.025^a	4.327±0.934^c	13.433±0.323^bc	28.689±1.148^a
	P4	1.030±0.108^bc	10.687±2.509^a	14.747±0.677^ab	22.244±3.585^b
	P5	1.087±0.075^abc	4.363±1.436^c	13.367±1.112^bc	25.689±3.278^ab
	P6	1.000±0.046^bc	4.990±1.552^bc	14.160±0.685^b	25.313±5.62^ab
橡胶树热研7-33-97	CK2	1.105±0.086^a	3.177±0.545^abc	15.753±0.218^ab	28.7333±2.82213^ab
	R1	1.049±0.058^a	3.931±0.716^a	14.145±0.492^c	28.6889±1.00074^b
	R2	1.082±0.018^a	3.014±0.855^abc	14.633±0.364^bc	28.5111±3.92164^ab
	R3	1.080±0.072^a	3.478±0.580^ab	14.546±0.572^bc	25.8667±2.94241^ab
	R4	1.078±0.046^a	2.600±0.337^bc	16.036±0.490^a	29.6444±3.57854^ab
	R5	1.042±0.028^a	2.764±0.444^bc	15.283±0.690^ab	30.5667±1.34280^a
	R6	1.055±0.070^a	2.375±0.388^c	14.923±0.301^abc	29.4000±4.40151^ab