Storage Root Configuration of Cassava and the Influence for Mechanical Harvesting

doi:10.3969/j.issn.1000-2561.2019.10.016

Abstract

Abstract:

The storage root configuration (SRC), which is the spatial distribution characteristics of cassava storage root under soil, will directly affect the mechanical harvesting effect. The SRC of 3 cassava varieties, South China 205 (SC205), Nanzhi 199 (NZ199) and Xinxuan 048 (XX048) was studied to find out the appropriate varieties and technological parameters for mechanical harvesting. The SRC of SC205 and NZ199 were good for mechanical harvesting. The best half harvesting width per plant and best harvesting depth for SC205 also NZ199 was 0.0-35.0 cm and 0.0-25.0 cm respectively. Under the condition, the harvesting rate of storage root number and weight of SC205 was 100.0%, and that of NZ199 was above 96.0%. It is recommended that the half width per plant and harvesting depth is 35.0 cm and is 25.0 cm correspondingly for the mechanical harvesting of cassava.

Key words: cassava, storage root configuration, mechanical harvesting, half width per plant, harvesting depth

SU Bimeng,WANG Juan,HUANG Jie,WEI Yunxia,DENG Ganran,HE Fengguang,YU Changde,CHEN Chen,LIU Zhi. Storage Root Configuration of Cassava and the Influence for Mechanical Harvesting[J]. Chinese Journal of Tropical Crops, 2019, 40(10): 2029-2033.

Figures/Tables 6

Fig. 1 The spatial distribution characteristics of cassava storage root under soil

Tab. 1 Storage root number, length and diameter of three cassava varieties

品种 Varieties	结薯数 Number of storage root	薯长 Length of storage root/cm	薯径 Diameter of storage root/cm
品种 Varieties	结薯数 Number of storage root	薯长 Length of storage root/cm	薯头 Head	薯中Middle	薯尾 Tail
SC205	7.4±0.4^a	28.1±1.4^a	6.1±0.2^b	5.9±0.2^ab	4.3±0.2^a
NZ199	6.2±0.4^a	31.7±1.6^a	5.9±0.2^bc	5.5±0.2^b	3.6±0.1^b
XX048	7.0±0.7^a	28.8±1.2^a	7.1±0.3^a	6.4±0.2^a	4.2±0.1^ab

Tab. 2 Rate of storage root number in different half width per plant of three cassava varieties

品种 Varieties	薯块半幅宽 Half width of storage root per plant/cm
品种 Varieties	0.0~25.0	25.1~30.0	30.1~35.0	35.1~40.0	40.1~45.0
SC205	82.2^a	13.4^a	4.4^b	0.0^b	0.0^b
NZ199	77.6^b	13.9^a	4.5^b	2.8^a	1.2^ab
XX048	76.5^b	8.9^b	5.7^a	4.4^a	4.5^a

Fig. 2 Harvesting rate of storage root number in different depth under soil of three cassava varieties Different lowercase letters in the same depth under soil indicate significant differences (P<0.05).

Fig. 3 Harvesting rate of storage root weight in different depth under soil of three cassava varieties Different lowercase letters in the same depth under soil indicate significant differences (P<0.05).

Tab. 3 Average angle of α and β of three cassava varieties

品种Varieties	α/°	β/°
SC205	24.1±1.1^b	-5.8±12.8^a
NZ199	27.6±1.2^b	2.1±9.5^a
XX048	34.3±1.8^a	5.6±11.2^a

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