Analysis of Rational Close Planting with Agronomic Ttraits and Yield in Intense Tillering Ability Augarcane Variety

doi:10.3969/j.issn.1000-2561.2019.06.006

Abstract

Abstract:

Sugarcane (Saccharum officinarum L.) is an important sugar crop harvested mainly for millable canes. Tillering is the key to increase the millable canes thereby increasing per unit area yield and sugar yield. In this paper, sugarcane variety ‘B9’ (intense tillering ability) was planted in field plots treated with 4 different planting densities, i.e. 4000 buds/667 m ² (P1), 6000 buds/667 m ² (P2), 8000 buds/667 m ² (P3), and 10 000 buds/667 m ² (P4), and the plot experiment of one year new planting and one year sugarcane ratoon root was carried out to discuss the effects of planting density on the characters and yield of the sugarcane variety of intense tillering ability, and to analyze the correlation between them. The results showed that, the total seedlings number of planting cane and ratoon cane in the vigorous tillering period increased with increasing planting density, but the difference between them decreased with an average of 25.55%, 14.11%, -8.18% and -10.57%, respectively. The height of ratoon cane was significantly higher than that of planting cane, with an average increase of 17.31%, 10.54%, 19.44% and 14.88%, but the stem diameter was almost unaffected by planting density. Except the result of P2, the millable canes and yield of planting cane increased with the increase of planting density, and although millable canes of planting cane was more than that of ratoon cane, but its yield showed an opposite result. The difference of Brix between low planting density (P1) and high planting density (P4) was significant and showed a decreasing trend. In the process of yield formation under our test conditions, planting density was positively correlated with the total number of sugarcane seedlings at the vigorous tillering stage, plant height, millable canes and yield, negatively correlated with stem diameter and Brix, and then the contribution of plant height and millable canes to yield was the most significant, but too many millable canes were not obviously good for Brix in sugarcane. Therefore, the results indicate that the rational close planting is very important for the formation of yield and quality of the sugarcane variety of intense tillering ability.

Key words: sugarcane, tillering, rational close planting, agronomic traits, yield

CLC Number:

S566.1

QIU Lihang,FAN Yegeng,ZHOU Huiwen,CHEN Rongfa,HUANG Xing,LUO Hanmin,YANG Rongzhong,DUAN Weixing,LIU Junxian,WU Jianming. Analysis of Rational Close Planting with Agronomic Ttraits and Yield in Intense Tillering Ability Augarcane Variety[J]. Chinese Journal of Tropical Crops, 2019, 40(6): 1075-1082.

Figures/Tables 5

References 41

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处理 Treatment	2016年基本苗数 The basic shoots in 2016	2016年分蘖苗数 The tillers in 2016	2016年总苗数 The total shoots in 2016	2017年宿根总苗数 The total ratoons in 2017	平均增幅 Increased by/%
P1	185.00±14.47^a	148.00±12.24^b	333.00±26.69^e	418.00±56.17^de	+25.55
P2	233.00±4.84^b	204.00±22.42^ab	437.00±29.87^cd	499.00±42.68^bcd	+14.11
P3	339.00±13.31^c	231.00±7.23^a	570.00±13.23^ab	524.00±10.04^bc	-8.18
P4	416.00±18.22^d	209.00±19.04^ab	625.00±2.73^a	559.00±23.62^ab	-10.57

处理 Treatment	2016年基本苗数 The basic shoots in 2016	2016年分蘖苗数 The tillers in 2016	2016年总苗数 The total shoots in 2016	2017年宿根总苗数 The total ratoons in 2017	平均增幅 Increased by/%
P1	185.00±14.47^a	148.00±12.24^b	333.00±26.69^e	418.00±56.17^de	+25.55
P2	233.00±4.84^b	204.00±22.42^ab	437.00±29.87^cd	499.00±42.68^bcd	+14.11
P3	339.00±13.31^c	231.00±7.23^a	570.00±13.23^ab	524.00±10.04^bc	-8.18
P4	416.00±18.22^d	209.00±19.04^ab	625.00±2.73^a	559.00±23.62^ab	-10.57

处理Treatment	株高Plant height/cm		茎径Stem diameter/mm
处理Treatment	2016年新植蔗 Plant cane in 2016	2017年宿根蔗 Ratoon cane in 2017	2016年新植蔗 Plant cane in 2016	2017年宿根蔗 Ratoon cane in 2017
P1	324.53±15.12^c	380.72±16.46^ab	26.77±0.70^a	25.13±0.22^b
P2	331.95±3.96^c	366.95±15.85^b	26.42±0.22^ab	25.17±0.65^b
P3	332.92±6.29^c	397.63±4.31^a	25.75±0.69^ab	25.60±0.27^ab
P4	352.50±7.18^bc	404.95±6.88^a	26.24±0.46^ab	25.11±0.70^b

处理Treatment	株高Plant height/cm		茎径Stem diameter/mm
处理Treatment	2016年新植蔗 Plant cane in 2016	2017年宿根蔗 Ratoon cane in 2017	2016年新植蔗 Plant cane in 2016	2017年宿根蔗 Ratoon cane in 2017
P1	324.53±15.12^c	380.72±16.46^ab	26.77±0.70^a	25.13±0.22^b
P2	331.95±3.96^c	366.95±15.85^b	26.42±0.22^ab	25.17±0.65^b
P3	332.92±6.29^c	397.63±4.31^a	25.75±0.69^ab	25.60±0.27^ab
P4	352.50±7.18^bc	404.95±6.88^a	26.24±0.46^ab	25.11±0.70^b

处理 Treatment	有效茎数 Number of millable canes in field plot		产量 Yield/(kg?plot^-1)		锤度 Brix/%
处理 Treatment	2016年新植蔗 Plant cane in 2016	2017年宿根蔗 Ratoon cane in 2017	2016年新植蔗 Plant cane in 2016	2017年宿根蔗 Ratoon cane in 2017	2016年新植蔗 Plant cane in 2016	2017年宿根蔗 Ratoon cane in 2017
P1	258.00±8.01^bc	247.00±20.04^c	342.10±21.20^bc	424.77±29.59^a	17.33±0.74^ab	17.89±0.41^ab
P2	245.00±10.14^c	269.00±13.09^bc	298.37±14.47^c	391.97±42.53^ab	16.58±0.16^b	18.29±0.28^a
P3	291.00±4.63^ab	268.00±4.73^bc	384.73±9.88^ab	383.30±12.94^ab	16.63±0.91^b	18.24±0.05^a
P4	316.00±7.16^a	284.00±5.29^ab	415.63±4.88^a	417.87±29.03^a	14.64±0.21^c	14.87±0.10^c